This article was downloaded by: [Bibliothèques de l'Université de Montréal] On: 27 August 2014, At: 11:13 Publisher: Routledge Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK Applied Developmental Science Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/hads20 Exposure to Neighborhood Affluence and Poverty in Childhood and Adolescence and Academic Achievement and Behavior a a Sara Anderson , Tama Leventhal & Véronique Dupéré a b Tufts University b Univeristé de Montréal Published online: 17 Jul 2014. To cite this article: Sara Anderson , Tama Leventhal & Véronique Dupéré (2014) Exposure to Neighborhood Affluence and Poverty in Childhood and Adolescence and Academic Achievement and Behavior, Applied Developmental Science, 18:3, 123-138, DOI: 10.1080/10888691.2014.924355 To link to this article: http://dx.doi.org/10.1080/10888691.2014.924355 PLEASE SCROLL DOWN FOR ARTICLE Taylor & Francis makes every effort to ensure the accuracy of all the information (the “Content”) contained in the publications on our platform. However, Taylor & Francis, our agents, and our licensors make no representations or warranties whatsoever as to the accuracy, completeness, or suitability for any purpose of the Content. Any opinions and views expressed in this publication are the opinions and views of the authors, and are not the views of or endorsed by Taylor & Francis. The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. 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Terms & Conditions of access and use can be found at http:// www.tandfonline.com/page/terms-and-conditions APPLIED DEVELOPMENTAL SCIENCE, 18(3), 123–138, 2014 Copyright # Taylor & Francis Group, LLC ISSN: 1088-8691 print=1532-480X online DOI: 10.1080/10888691.2014.924355 Exposure to Neighborhood Affluence and Poverty in Childhood and Adolescence and Academic Achievement and Behavior Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 Sara Anderson and Tama Leventhal Tufts University Ve´ronique Dupe´re´ Univeriste´ de Montre´al Evidence points to associations between the socioeconomic composition of neighborhoods and children’s and adolescents’ development. A minimal amount of research, however, examines how timing of exposure to neighborhood socioeconomic conditions matters. This study used longitudinal data from the NICHD Study of Early Child Care and Youth Development (N ¼ 1,364) to explore if timing of exposure (early childhood, adolescence, and cumulative) to neighborhood affluence and poverty had differential associations with children’s achievement and behavior problems concurrently and in adolescence. Results indicate that children in neighborhoods with more affluent residents during early childhood had higher achievement and fewer internalizing behaviors contemporaneously and that these associations endured until adolescence for reading achievement. Long-term exposure to affluent neighborhoods was associated with children’s math and reading achievement in adolescence. Findings are discussed in terms of research and policy implications. Neighborhoods are an important social context for children and adolescents because they provide access to resources, opportunities, and interactions that influence development (Sampson, 2000). One of the most consistent empirical findings supporting this view is the frequently observed association between neighborhood socioeconomic status (SES) and children’s development (Leventhal, Dupe´re´, & Shuey, in press). Neighborhood affluence, often conceptualized as the presence of affluent, college-educated, and=or professional residents, is favorably associated with children’s and adolescents’ achievement-related outcomes, such as test scores and educational attainment (e.g., Boyle, Georgiades, Racine, & Mustard, 2007; Sastry & Pebley, 2010). Neighborhood affluence may be important for children’s achievement because those living in affluent neighborhoods typically Address correspondence to Sara Anderson, Center for Promise, 177 College Avenue, Eliot-Pearson Department of Child Study and Human Development, Tufts University, Medford, MA 02155. E-mail: [email protected] have access to high quality institutions and have daily exposure to role models supportive of education (Dupe´re´, Leventhal, Crosnoe, & Dion, 2010). Conversely, neighborhood poverty or disadvantage, typically defined in term of residents with incomes below the poverty level, who are unemployed, and who receive public assistance, places children and adolescents at risk for social, emotional, and behavioral problems (e.g., Dupe´re´, Lacourse, Willms, Leventhal, & Tremblay, 2008; Xue, Leventhal, Brooks-Gunn, & Earls, 2005). Neighborhood poverty may be central for children’s functioning because it erodes neighborhood institutions and social cohesion and control, which can cause a breakdown in shared norms and values regarding young people’s behavior (Sampson, Morenoff, & Gannon-Rowley, 2002). Thus, the ways in which neighborhood affluence and poverty contribute to children’s development as well as what they signal about community resources and processes are likely quite distinct. Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 124 ANDERSON ET AL. Despite rather consistent evidence that neighborhood SES is linked with developmental outcomes in both childhood and adolescence, several reviews suggest that adolescence may be a period of unique vulnerability to direct neighborhood effects (Leventhal et al., in press; Steinberg & Morris, 2001). A minimal amount of empirical research, however, has explored whether neighborhood influences are particularly salient during adolescence or the issue of developmental timing and neighborhood exposure more generally (as exceptions, see Sastry & Pebley, 2010; Wheaton & Clarke, 2003). Moreover, the few studies that address this topic are limited in scope because they did not consider both neighborhood affluence and poverty or a range of developmental outcomes. As such, this study’s goal is to close these gaps by using longitudinal data from a diverse sample of youth followed from birth through early adolescence to examine associations between exposure to neighborhood affluence and poverty in early childhood and=or adolescence, and children’s achievement (reading and math) and behavior problems (externalizing and internalizing) during those same developmental periods. The timing of exposure to neighborhood affluence and poverty is important to consider, as the role of the neighborhood context may vary as children experience different demands and transitions across development (Elder, 1995). Identifying which aspect of neighborhood SES matters most, for which outcomes, and when is critical for informing policy and practice. Issues related to selection bias are a major threat to the validity of studies linking neighborhood characteristics and development. Families have some choice as to where they live and any observed associations between neighborhood SES and children’s development, regardless of timing, may be due to unmeasured characteristics (e.g., personality, mental health) that lead parents to choose certain neighborhoods and that are associated with children’s development. Several approaches have been used to address selection bias. The most powerful are experimental studies conducted in the context of housing programs for poor families. Moving to Opportunity is the most well-known experimental study in which a subset of poor, mostly minority families living in public housing in high poverty neighborhoods were given the opportunity to move to low poverty neighborhoods, while another subset remained in high poverty neighborhoods. A recent 10-year evaluation reported beneficial effects of moving from high- to low-poverty neighborhoods (vs. staying in high poverty) on adolescent girls’ mental health outcomes (Sanbonmatsu et al., 2011). Although methodologically strong, experiments have their limitations, notably around issues of generalizability of results obtained in the very specific context of relocation out of highly disadvantaged urban neighborhoods. Because of our interest in associations between a more normative range of neighborhood conditions and development, we took an observational approach, common in the field. Studies using wellcontrolled observational designs are thought to be a necessary to complement the results from experimental studies that address a very narrow set of research questions (Wright, 1999). Conceptual Models of Neighborhood Timing Ecological and developmental systems theories describe how children are nested in interrelated contexts, including family, neighborhood, school, and peers, that are critical for development; the salience of these contexts shifts across development (Bronfenbrenner & Morris, 2006; Elder, 1995; Lerner, 2006). Developmental challenges during these periods are relatively universal and require new modes of adaptation to biological, psychological, or social changes (Graber & Brooks-Gunn, 1996). Moreover, a life-course perspective suggests that development is lifelong and that no period should be considered in isolation (Johnson, Crosnoe, & Elder, 2011). Bioecological and developmental systems theories should be employed in conjunction with domainand period-specific developmental transitions to make predictions about how and when neighborhoods matter. For example, adolescents have more independence, affiliate more with peers, and have more direct access to the neighborhood social and physical environment than younger children so adolescence may be a period when exposure to neighborhood conditions is particularly relevant (Steinberg & Morris, 2001). However, rapid cognitive, physical, and socioemotional development during early childhood and the importance of access to resources during this period raise the possibility that early childhood may be a period when neighborhoods matter most (Shonkoff & Phillips, 2000). Based on these perspectives, we propose three theoretical models for conceptualizing the timing of neighborhood effects: early exposure and carry forward, adolescent exposure, and cumulative exposure (see Figure 1). The models focus the analytic approach to our study. These models are likely to be complementary, varying in applicability by aspect of neighborhood SES and child outcome. We present the theoretical and empirical grounds for each model in the larger developmental and neighborhood literature. For each model, we consider achievement and internalizing and externalizing behaviors because they represent distinct domains of development that can have implications for subsequent functioning (Duncan & Magnusson, 2011; Lescheid, Chiodo, Nowicki, & Rodger, 2007). Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 EXPOSURE TO NEIGHBORHOOD AFFLUENCE AND POVERTY 125 FIGURE 1 Conceptual models of neighborhood affluence and poverty on child outcomes. Early Exposure and Carry Forward Model The early exposure and carry forward model proposes that early exposure to neighborhood SES is associated with children’s concurrent and, likely, their later development. This model grows out of developmental research pointing to early childhood as a period of unique vulnerability to environmental influences (Carnegie Corporation, 1994). Because children’s cognitive abilities develop throughout childhood and adolescence and build upon prior skills, early childhood experiences may set children on a trajectory that carries into later development (Magnuson, Duncan, & Kalil, 2006). A relatively large body of research on family economic status has explicitly tested whether the association between economic conditions and children’s outcomes varies across developmental periods (Brooks Gunn, Duncan, & Maritato, 1997; Duncan & Brooks-Gunn, 1997; Evans & Schamberg, 2009; Guo, 1998; McLeod & Shanahan, 1996). Consistent with an early exposure model, research on family income indicates that exposure to poverty during early childhood, as opposed to other developmental periods, is most salient for children’s achievement (vs. behavior problems) (e.g., Duncan & Brooks-Gunn, 1997). Extant research demonstrates the importance of neighborhood SES during early childhood for achievement and, to a lesser extent, behavioral functioning. A study with a British sample found that early childhood neighborhood poverty was associated with achievement at that time but not in middle childhood or adolescence (McCulloch & Joshi, 2001). Another study with a diverse U.S. sample reported that neighborhood affluence in early childhood was associated with children’s reading achievement in first grade, but not with subsequent learning rates into adolescence (Dupe´re´ et al., 2010). A final study using nationally representative data found that exposure to neighborhood poverty in childhood, compared with exposure in adolescence or early adulthood, had the largest associations with mental health in early adulthood (Wheaton & Clarke, 2003). Thus, several studies point to the importance of exposure to neighborhood conditions during early childhood; however, comparisons with other periods and across multiple domains of functioning are lacking. Based on this limited 126 ANDERSON ET AL. body of research, we hypothesized that early childhood exposure to neighborhood affluence will be favorably associated with contemporaneous achievement and that this association will persist into adolescence. Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 Adolescent Exposure Model The adolescent exposure model proposes that neighborhood SES has pronounced associations with developmental outcomes during this period (McLoyd et al., 2009). This expectation is based on the fact that by early adolescence, and to a lesser extent middle childhood (Eccles, 1999), parents begin to grant older children more autonomy than in prior developmental periods. Thus, in adolescence, youth typically have more direct exposure to extra-familial influences than in prior periods, notably to neighborhoods and peer groups (Brown & Larson, 2009). Somewhat surprisingly, almost no research has explored the premise that neighborhood effects are especially pronounced in adolescence; however, indirect support for this notion comes from the large body of research examining neighborhood SES and adolescents’ development, particularly links between poverty and adolescents’ delinquent, criminal, and violent behavior (Sampson, Morenoff, & Rowley, 2002). The focus on problem behaviors, such as drinking and delinquency, likely stems from their well-documented increase in adolescence (Loeber & Burke, 2011; Moffitt, 1993) and from the peer-oriented nature of these behaviors (Dodge, Coie, & Lynam, 2007). A restricted body of neighborhood research that specifically compares developmental periods does not generally support the adolescent exposure model (for example Wheaton & Clarke, 2003, as reviewed in the prior section). A study employing longitudinal data on a diverse sample of youth reported associations among middle childhood and adolescent neighborhood safety with adolescent and young adult depression and substance use (Kiff et al., 2012), but differences in the associations between periods were not directly tested. Yet, a large body of work demonstrates associations between adolescent neighborhood poverty with concurrent outcomes (for reviews see Leventhal, Dupe´re´, & Brooks-Gunn, 2009; McBride Murry, Berkel, Gaylord-Harden, Copeland-Linder, & Nation, 2011), although associations are generally not compared with other developmental periods. With respect to this model, we hypothesized that neighborhood poverty will be more strongly associated with children’s externalizing behaviors during adolescence than during prior developmental periods and for other outcomes. neighborhood conditions may be more strongly associated with adolescents’ outcomes than exposure during any single period. Individual exposure to neighborhood SES may have a variety of trajectories based on neighborhood change across time and residential moves, with differential implications for children’s behavior (Leventhal & Brooks Gunn, 2011). Likewise, prior research on family economic conditions indicates that living in poverty continuously, compared with no exposure to poverty, had a large adverse association with children’s achievement and that associations for transient poverty were small (Smith, Brooks-Gunn, & Klebanov, 1997). Accordingly, we examined how trajectories of children’s exposure to neighborhood affluence or poverty over time may differentially shape their development. A minimal amount of research, to our knowledge, has examined children’s neighborhood trajectories and adolescent development; however, studies examining exposure to neighborhood SES over time may be informative. Findings from a nationally representative, longitudinal study reported that associations among neighborhood income and children’s achievement and behavior were strongest for those who lived in their neighborhoods for three or more years (Lo´pez Turley, 2003). Other studies using national data found that cumulative measures of neighborhood SES, as opposed to a single point in time measure, had larger associations with adolescents’ odds of high school dropout and sexual initiation (Crowder & South, 2011; South & Crowder, 2010; Wodtke, Harding, & Elwert, 2011). This body of research suggests that long-term exposure to various trajectories of neighborhood affluence and poverty may be differentially associated with adolescent outcomes than single measures within developmental period. Specifically, we anticipated different trajectories of neighborhood affluence and poverty, ones indicating stability and change over time, based on demographic trends at the family and neighborhood levels (Kan, 1999; Schachter, 2001). We expected that exposure to neighborhood conditions marked by growing advantaged or disadvantaged circumstances will be associated with children’s achievement (higher achievement living in high and increasing affluence) and externalizing behaviors (more problem behaviors living in high and increasing poverty) in adolescence. Given research suggesting adverse internalizing outcomes for exposure to point-intime measures of neighborhood affluence and poverty (Luthar, 2003; Xue et al., 2005), we did not develop a specific hypotheses for this outcome. Current Study Cumulative Exposure Model The cumulative exposure model is based on the assumption that prolonged exposure to adverse or favorable The goal of this study was to examine developmental differences in associations between exposure to early childhood and adolescent neighborhood affluence and EXPOSURE TO NEIGHBORHOOD AFFLUENCE AND POVERTY Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 poverty and children’s outcomes in early childhood and adolescence; and to examine differences in associations between cumulative aspects of neighborhood affluence and poverty, indicated by the trajectories of neighborhood affluence and poverty, and adolescent outcomes. The outcomes considered are achievement and behavior problems. Although we explored all associations between neighborhood affluence and poverty and participants’ outcomes, we anticipated different associations depending on participants’ developmental status, trajectories of exposure, and outcome of interest as reviewed in the prior sections. METHOD Study Design and Sample This study used data from the NICHD Study of Early Child Care and Youth Development (NICHD SECCYD, see NICHD Early Child Care Research Network, 2005). Data collection began in ten sites across the United States in 1991 in: Little Rock, AR; Irvine, CA; Lawrence, KS; Boston, MA; Philadelphia, PA; Pittsburgh, PA; Charlottesville, VA; Morganton, NC; Seattle, WA; Madison, WI. Participants were recruited by hospital visits around the time the child was born. To be eligible for the study, the mother had to be at least 18 years of age, healthy, and conversant in English, and the infant had to be a singleton. One month post-recruitment, 1,364 families enrolled in the study. The collection of data occurred in the home, laboratory, child care, and school settings from birth through approximately ninth grade (15 years of age) and proceeded in four phases with multiple assessment periods, from every six months to annually, within each phase (birth to 54 months, kindergarten to first grade, second to sixth grade, and seventh grade to ninth grade). The SECCYD is not nationally representative, but it included children from across the socioeconomic spectrum and was representative of its catchment areas. It is comprised of 18% racial=ethnic-minority children, 10% low-education mothers (less than a high school), and 21% single parents. The study was primarily designed to examine the long-term associations between early childhood care and later development but has been used to examine diverse facets of development, including neighborhoods and child development (e.g., Dupe´re´ et al., 2010; Lund & Dearing, 2012). As is common in longitudinal studies, some participants dropped out, missed occasional data collection points, and=or had partial missing data on specific measures. Data were missing for 0% (demographic characteristics, early childhood measures) to 30% (measures of adolescent behavior) of the sample. No single covariate 127 significantly predicted missingness of grade nine outcome variables (which had the most missing data), which we take as evidence that data were missing at random (full results available from first author upon request). We employed full information maximum likelihood (FIML) estimation techniques with robust standard errors in Mplus 7.0 to handle missing data and 10 multiply imputed data sets with Stata 12.0 for descriptive analyses. Measures Three developmental periods—early childhood (birth to 54 months), middle childhood (kindergarten to grade five), and early adolescence (grade six to grade nine)— were distinguished in our study. Early childhood and adolescence were the focus of the analyses reported here given our theoretical models that propose associations between neighborhood SES and child outcomes in early childhood, adolescence, or cumulatively (with associations with adolescent outcomes) and a general lack of evidence for associations between neighborhood SES and middle childhood outcomes over and above exposure in other periods (e.g., Wheaton & Clarke, 2003). Achievement Reading and math achievement were measured on three occasions (54 months, fifth grades, and ninth grade) by subtests of the Woodcock-Johnson PsychoEducational Battery-Revised (WJ-R, Woodcock & Johnson, 1989). For reading achievement, no single subtest was administered throughout the observation window; earlier subtests gauged basic reading skills, whereas later subtests assessed more complex abilities such as comprehension. The Letter-Word Identification (LW) subtest was used at 54 months, broad reading ability at fifth grade (letter-word, reading fluency, and passage comprehension), and Passage Comprehension at ninth grade. For math achievement, a single subtest, Applied Problems (AP), was used at all periods. All subtests had high internal reliabilities (a ¼ .81 to .92). Raw scores on reading and math subtests were converted to W scores, special transformations of the Rasch ability scale that centered the raw score on a value of 500, to assess change over time. Behavior Problems Externalizing and internalizing behaviors were measured by standardized subscales of the Child Behavior Checklist (CBCL; Achenbach, 1991a) completed by parents at 54 months, fifth grade, and ninth grade. Children also completed the Youth Self Report at ninth grade (YSR; Achenbach, 1991b). The externalizing scale 128 ANDERSON ET AL. consists of the Delinquent Behavior (e.g., lies or cheats) and Aggressive Behavior (e.g., argues a lot) subscales (a ¼ .84 to .91). The internalizing behavior scale is comprised of the Withdrawn (e.g., won’t talk, shy, sad), Somatic Complaints (e.g., dizzy, tired, stomachaches), and Anxious=Depressed (e.g., lonely, cries, worthless) subscales (a ¼ 86 to .87). For both scales, possible scores ranged from 30 to 100, with higher scores indicating greater affinity to display behavior problems. Both measures are normally distributed (skew ¼ .17 to .27). Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 Neighborhood SES The main variables of interest were neighborhood affluence and poverty. On an annual basis, families’ reported addresses (including any interim address changes) were linked to 1990 (1–54 months; early childhood) and 2000 (first through ninth grade; middle childhood and adolescence) U.S. Census data at the block group level. Census block groups are subdivisions of a census tract that comprise a combination of street blocks and contain from 600 to 3,000 residents. Following previous work (e.g., Duncan & Aber, 1997), we created standardized composite variables for neighborhood affluence and poverty indicators for each developmental period by taking the average of all Census indicators within each period. Neighborhood affluence consisted of the percentage of adults with at least a B.A. degree and the percentage of adults in managerial=professional jobs. Neighborhood poverty included the percentage of single mothers, the percentage of households under the U.S. poverty level, and the percentage of adults unemployed. (See Appendix A for correlations among neighborhood variables.) Confirmatory factor analysis supported the appropriateness of our neighborhood SES measures for each developmental period. All fit statistics indicated good model fit and coefficients from observed to latent variables were of the appropriate and anticipated size and magnitude (results available upon request). The ranges of the standardized neighborhood affluence values were 2.25 to 3.52 (early childhood), 2.67 to 2.87 (middle childhood), and 2.96 to 2.78 (early adolescence). Ranges for standardized neighborhood poverty were: 2.09 to 7.24 (early childhood), 1.68 to 5.71 (middle childhood), and 2.60 to 7.23 (adolescence). Although residential mobility was common, participants tended to move to relatively similar neighborhoods (results available upon request). Child, Parent, and Family Background Control Variables A wide variety of child=adolescent, parent, and family background characteristics were employed to minimize, though not eliminate, the threat of selection bias, as suggested by prior research (e.g., Anderson, Leventhal, & Dupe´re´, 2014). Both fixed and time varying covariates were used in our analyses. Fixed child covariates employed included child gender (female ¼ 0; male ¼ 1) and race=ethnicity (with two dichotomous variables indicating Black and other race=ethnicity, with White as omitted referent). Fixed maternal covariates include education and age (in years), verbal ability assessed by the Peabody Picture Vocabulary TestRevised (PPVT-R, Dunn & Dunn, 1981), beliefs about parenting (traditional and progressive; Schaefer & Edgerton, 1985), personality characteristics due to the potential association with proclivity to move (neuroticism, extroversion, and agreeableness; Costa & McCrae, 1985); and study site (with a set of nine dummy variables). The time-varying covariates were characteristics measured across the three developmental periods and were entered as covariates on each of the neighborhood SES variables. They included maternal depression as measured by the Center for Epidemiological Studies Depression Scale (CES-D; Radloff, 1977; a ¼ .88); the percentage of time that parents were married; an average of annual income-to-needs ratio (total annual family income divided by official poverty threshold for household size); and the number of times the child moved, assessed from mother-reported addresses at yearly interviews. Analytic Strategies To examine our hypotheses about how neighborhood affluence and poverty were associated with children’s achievement and behavior problems, path analyses were used to test our early and adolescent exposure models, and growth mixture models (GMM) were used to test our cumulative exposure model. We selected these approaches over alternative ones for several reasons. First, multilevel modeling was not used because there was insufficient clustering of participants within neighborhoods to warrant that approach and ICCs could not be calculated (Raudenbush & Bryk, 2002); 65–83% of participants (depending on the study year) were the only study child in their neighborhood. Second, as an alternative to GMM, we considered individual growth curve models, path models, and latent cumulative models but rejected them because of concerns about assuming linear relationships between and among variables (additional details and results available from authors upon request). Thus, the selected approaches were deemed most appropriate for testing our research questions given the available data. As a first step, we developed growth mixture models (GMMs) for our cumulative exposure models. These models assigns respondents to subgroups within a sample based on latent associations among selected EXPOSURE TO NEIGHBORHOOD AFFLUENCE AND POVERTY 129 TABLE 1 Descriptive Statistics for Neighborhood, Achievement, Externalizing, Internalizing Variables, and Covariates by Developmental Period Early Childhood Middle Childhood Adolescence Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 a Neighborhood Proportion single moms Proportion HH < 100% poverty Proportion unemployed adult Proportion with B.A. Proportion with professional job Covariates Child characteristics Male White Black Minority—other Maternal age Maternal education PPVT-R Traditional parent beliefs Progressive parent beliefs Neuroticism Agreeableness Extroversion % time father’s=mother’s partner in home # times moved Maternal depression Income=needs Achievement WJ Reading WJ Math Externalizing Internalizing M M M M M (SD) (SD) (SD) (SD) (SD) % % % % M (SD) M (SD) M (SD) M (SD) M (SD) M (SD) M (SD) M (SD) M (SD) M (SD) M (SD) M (SD) M M M M (SD) (SD) (SD) (SD) 8.92 10.41 5.30 26.77 33.58 (8.48) (10.02) (5.12) (17.56) (14.35) 51.7% 80.4% 12.9% 6.7% 28.10 14.23 97.99 60.39 32.71 29.89 46.44 42.44 .69 (5.64) (2.51) (19.66) (15.23) (3.53) (7.53) (5.57) (6.28) (.40) 1.08 (1.40) 9.88 (6.59) 3.40 (2.74) 368.86 423.51 51.86 47.27 (24.02) (22.65) (10.13) (10.47) 10.06 8.89 4.58 31.41 37.81 (8.87) (8.38) (5.17) (19.83) (16.27) 9.10 8.37 4.36 31.97 38.30 (8.98) (8.45) (6.01) (20.70) (17.03) .65 (.45) .66 (.50) 1.06 (1.43) 8.90 (7.42) 3.95 (3.42) .32 (.72) 9.85 (9.17) 4.70 (5.33) 507.26 510.32 45.99 48.88 (15.79) (15.00) (10.78) (11.73) 519.50 523.69 49.70 47.45 (15.22) (20.62) (11.83) (11.46) Note. N ¼ 1,364. Results combined across 10 imputed datasets. HH refers to household. WJ is Woodcock-Johnson Psychoeducational Battery (Woodcock & Johnson, 1989). a Conditions in early childhood based on 1990 U.S. Census and in middle childhood and adolescence on 2000 U.S. Census. variables by identifying meaningful patterns of initial status and change over time (Muthen, 2004). Using FIML, GMM provides fit information (i.e., Bayesian Information Criterion [BIC], Akaike Information Criterion) to evaluate the number of groups (or classes) that best captures the latent classes within the sample, the accuracy of the groups identified, and the number of participants per group. Using best practices in developing growth mixture models (Jung & Wickrama, 2007), we chose the most parsimonious models by selecting those with the lowest BIC, a significant Low-MendellRubin likelihood (LMR; tests the k and nested k 1 models to determine which model best fits the data), entropy close to 1.0 (near 1.0 indicates perfect classification), classes with no less than 5% of total sample in a class, and from a visual inspection of the data with plots of predicted classes. We considered the combination of fit statistics, number of classes, and visual inspection equally. We also conducted split-half replications, and trajectories were the same. We next tested our hypotheses regarding early, adolescent, and cumulative exposure to neighborhood SES1. All models included the full battery of covariates described in the previous section (see Table 1) and children’s achievement or behavioral problems at prior ages, providing important additional controls over potential selection or omitted variable bias. We estimated three models for each outcome (math and reading achievement and externalizing and internalizing behaviors). In Model 1, early childhood outcomes were predicted from early childhood neighborhood SES variables using path models, to test the early childhood hypotheses. For Model 2, we used path models (one for each outcome) to predict early childhood and adolescent outcomes from early childhood and adolescent neighborhood affluence and poverty variables to probe the 1 We chose our analyses to specifically test our proposed models, omitting direct tests of middle childhood and early adolescence for example. Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 130 ANDERSON ET AL. carry forward and adolescent exposure hypotheses. We did not include middle childhood neighborhood characteristics because they did not demonstrate significant associations with child outcomes in middle childhood and were collinear with adolescent neighborhood variables. We examined the indirect effects of early childhood neighborhood SES to early adolescent outcomes through middle childhood outcomes using the Model Indirect command in Mplus to test the carry forward hypothesis. The delta method, used in the Sobel Test, was employed in computing standard errors with this command (Muthe´n & Muthe´n, 1998–2010). The chi square (v2), comparative fit index (CFI), standardized root mean squared residual (SRMR), and the root mean square error of approximation (RMSEA) were examined to assess model fit. Significant chi square values indicate poor fit. CFI values of >0.90 indicate an adequate fit, and values of >0.95 indicate a good fit of the data to the model (Hu & Bentler, 1999). Values <0.08 of the SRMR are considered favorable. RMSEA values <0.06 indicate a good fit. Finally for Model 3, we tested the cumulative exposure model with the classes identified through GMMs and conducted chi square analyses to determine if identified classes were differentially associated with adolescents’ outcomes at ninth grade (Model 3; see Figure 1 for conceptual representations of all models). For these models, we were unable to examine the identified latent growth classes with the child outcomes and covariates in a single model because Mplus does not permit the use of latent classes and covariates to predict an outcome in a single model. As such, the residuals of regression equations predicting the child outcome from all previously described covariates were employed in these analyses, a technique used in prior analyses (Jung & Wickrama, 2007), and one that is analytically comparable. RESULTS Descriptive Analyses Descriptive analyses by developmental period are presented in Table 1. Generally, neighborhood affluence indicators increased across developmental periods. In addition, family income-to-needs increased over time, suggesting growth in family wealth over time. Conversely, neighborhood poverty indicators declined from early childhood to middle childhood and early adolescence. Participants generally moved more often during early and middle childhood than in adolescence. Neighborhood affluence and poverty variables were correlated with participant’s outcomes in the anticipated directions. (See Appendix B for correlations between the neighborhood variables and child and adolescent outcomes.) Cumulative Neighborhood SES: Growth Mixture Models Two latent class growth curves were developed to examine stability and change over time in children’s exposure to neighborhood affluence and poverty, and perhaps more importantly, to investigate how different types of cumulative exposure to neighborhood affluence or poverty were associated with adolescents’ achievement and behavior. Based on the criteria described, results of the GMM indicated four distinct trajectories of neighborhood affluence (see Table 2 and Figure 2): high-increasing (10.2% of sample; intercept ¼ 1.60, p < .001; slope ¼ .09, p < .05), moderate=high-increasing (22.3%; intercept ¼ .74, p < .001; slope ¼ .08, p < .05), moderate-stable (29.0%; intercept ¼ .14, p < .05; slope ¼ .004, ns), and low-decreasing (38.2%; intercept ¼ .85, p < .001; slope ¼ .08, p < .01). For the neighborhood poverty model, two distinct groups were observed and fit the data best, with most participants (88.5%; intercept ¼ .22, p < .001; slope ¼ .01, ns) in the low=moderate-stable neighborhood poverty class, whereas 11.5% were in the high-stable poverty class (intercept ¼ 1.72, p < .001; slope ¼ .07, ns). Predicting Achievement and Behavior: A Comparison of Three Models In this section, we describe the results pertinent to the three theoretical models by outcome. Results of path analyses for the early exposure and carry forward models are presented first, followed by analyses for the adolescent exposure model. Finally, we present results of cumulative models with the GMM classes as main independent variables. In all cases, the fit statistics indicated a good fit of the data to the models (see footnotes of Table 3). TABLE 2 Growth Mixture Models of Neighborhood High and Poverty From 1 Month Through Ninth Grade Number of Latent Classes Number Parameters Neighborhood Poverty 2 8 3 11 Neighborhood Affluence 2 8 3 11 4 14 5 16 y p < .10; p < .01; BIC Entropy LMR LRT (df) 8377.06 7855.48 .96 .89 1550.34 (3) 543.11 (3)y 8004.81 7398.44 7175.06 7784.77 .86 .81 .85 .84 1922.60 570.94 301.87 159.37 p < .001. (3) (3) (3) (3) EXPOSURE TO NEIGHBORHOOD AFFLUENCE AND POVERTY 131 Achievement Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 Math FIGURE 2 Distinct trajectories of neighborhood affluence and poverty across (1) early childhood, (2) middle childhood, and (3) early adolescence. In Model 1, the results revealed that children who lived in neighborhoods with more affluent residents in early childhood had higher early childhood math achievement (b ¼ .07, p < .05); however, in Model 2, when early childhood and adolescent neighborhood affluence variables were included in the same models, the association between early childhood neighborhood affluence and concurrent math achievement was attenuated. Similarly, the indirect association between early childhood affluence and adolescents’ math achievement through middle childhood math achievement was marginally significant (see Table 3). The association between living in a neighborhood with more affluent residents in adolescence and children’s math achievement in ninth grade was significant (b ¼ .08, p < .05). Thus, results were primarily consistent with the adolescent exposure hypothesis for neighborhood affluence and math achievement; no significant associations were found for neighborhood poverty and children’s math achievement. In the overall model, the four neighborhood affluence latent classes marginally differentiated adolescents’ math achievement (v2 [3] ¼ 7.15, p ¼ .07); however, pairwise comparisons demonstrated that participants exposed to high-increasing neighborhood affluence had greater math achievement in adolescence (M ¼ 3.99; SD ¼ 1.99) than those exposed to either low-decreasing TABLE 3 Unstandardized Path Coefficients From Path Models Relating Neighborhood High and Poverty to Achievement and Problem Behaviors Math Achievement Model 1 Model 2a Reading Achievement Model 1 Model 2b Externalizing Model 1 Model 2c Internalizing Model 1 Model 2d Early Childhood Achievement .59 (.44) .66 (.44) .22 (.38) .24 (.38) Early Childhood Poverty 1.06 (.83) .88 (.83) 1.54 (.89)y 1.25 (.89) Early Childhood Affluence 1.49 (.74) 1.45 (.77)y 2.54 (.84) 2.43 (.86) .20 (.38) .12 (.37) .73 (.35) .70 (.35) Direct and indirect neighborhood SES to adolescent achievement Adolescent Poverty .26 (.49) .16 (.33) .09 (.43) .07 (.35) Adolescent Affluence 1.36 (.53) .06 (.40) .17 (.46) .05 (.48) Indirect early child poverty to .24 (.22) .16 (.12) .05 (.04) .02 (.03) adolescence through middle childhood outcome Indirect early child affluence to .39 (.21)y .31 (.11) .01 (.03) .06 (.03)þ adolescence through middle childhood outcome Note. Standard errors in parentheses. Standardized scores are available upon request to the first author and included within the body of the text if p < .05. N ¼ 1,364. Covariates include, site, child gender, Black=Other race, maternal PPVT-R, personality characteristics, parenting beliefs, age, and education; and repeated assessments of income=needs, proportion of time mother had husband=partner, residential mobility, and maternal depression. Similar or identical results found when only investigated high or low neighborhood in separate models. a Fit indices: v2(30) ¼ 39.54, CFI ¼ .994, RMSEA (95% CI) ¼ .015 (.000, .027), SRMR ¼ .005. b Fit indices: v2(30) ¼ 37.89, CFI ¼ .995, RMSEA (95% CI) ¼ .014 (.000, .026), SRMR ¼ .004. c Fit indices: v2(30) ¼ 58.93, CFI ¼ .958, RMSEA (95% CI) ¼ .027 (.016, .037), SRMR ¼ .007. d Fit indices: v2(30) ¼ 58.93, CFI ¼ .958, RMSEA (95% CI) ¼ .027 (.016, .037), SRMR ¼ .007. y p < .10; p < .05; p < .01. 132 ANDERSON ET AL. (v2 [1] ¼ 4.45, p ¼ .04; M ¼ .55; SD ¼ .80. d ¼ 2.99) or moderate-stable (v2 [1] ¼ 5.35, p ¼ .02; M ¼ 1.39; SD ¼ 1.25, d ¼ 3.24) neighborhood affluence. Results from the neighborhood poverty growth trajectories revealed that cumulative exposure to neighborhood poverty was not significantly associated with adolescent math achievement (v2 [1] ¼ .96, p ¼ .33). Findings were consistent with the cumulative exposure hypothesis, but only for neighborhood affluence among some trajectories. Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 Reading Model 1 suggested that living in a neighborhood with more affluent residents in early childhood was significantly associated with children’s concurrent reading achievement (b ¼ .10, p < .01). In Model 2, reading achievement gains conferred by living in a neighborhood with affluent residents in early childhood were indirectly associated with reading achievement in adolescence through middle childhood achievement (b ¼ .02, p < .01), but no support was found for the adolescent exposure hypothesis. Exposure to neighborhoods with more affluent residents was associated with concurrent reading achievement, which endured to early adolescence in further support of the early exposure and carry forward hypothesis. Results indicated no overall significant differences in reading achievement for children of different neighborhood affluence trajectories (v2 [3] ¼ 5.13, p ¼ .16), but several pairwise comparisons were significant. Participants who were exposed to high-increasing neighborhood affluence had higher reading achievement in adolescence (M ¼ 2.55; SD ¼ 1.22) than those exposed to either low-decreasing (v2 [1] ¼ 3.92, p ¼ .05; M ¼ .30; SD ¼ .76, d ¼ 2.80) or moderate-stable (v2 [1] ¼ 4.30, p ¼ .04; M ¼ .52; SD ¼ .86, d ¼ 2.91) neighborhood affluence. Results from the neighborhood poverty model indicated that the two poverty neighborhood trajectories did not significantly differentiate adolescent reading achievement (v2 [1] ¼ .26, p ¼ .61). In sum, findings partially support the cumulative exposure hypothesis for neighborhood affluence and reading achievement. Behavior Problems Externalizing No significant associations emerged for early childhood or adolescent exposure to neighborhood affluence or poverty and children’s externalizing behaviors (see Table 3). Furthermore, we found no evidence that differential cumulative exposure to neighborhood affluence (v2 [3] ¼ 1.32, p ¼ .72) or poverty (v2 [1] ¼ 3.03, p ¼ .08) was associated with participant’s externalizing behaviors. Thus, no support for any of our hypothesized models emerged for participant’s externalizing behaviors. Internalizing Exposure to affluent residents in early childhood was associated with fewer children’s concurrent internalizing symptoms (Model 1; b ¼ .07, p < .05); however, in the carry forward and early adolescent model (Model 2), we found no indication that this relationship significantly endured. In addition, neighborhood poverty was not associated with children’s internalizing symptoms for either of our models. The overall chi square for differences in internalizing symptoms between the four neighborhood affluence trajectories was non-significant, indicating that exposure to different trajectories was not associated with children’s internalizing symptoms in adolescence (v2 [3] ¼ 2.743 p ¼ .49). All pairwise comparisons were non-significant as well. Similar results were found for children’s exposures to the cumulative neighborhood poverty trajectories and their internalizing symptoms in adolescence (v2 [1] ¼ 1.51, p ¼ .22). In short, we found no support for the cumulative exposure model for neighborhood affluence or poverty and children’s internalizing symptoms. DISCUSSION This study is one of the first, to our knowledge, to explore how associations between neighborhood affluence and poverty and children’s achievement and behavior problems varied as a function of time and timing of exposure. With the benefit of a longitudinal design and a rich set of stable and time-varying covariates to minimize selection bias, we found differential associations between neighborhood affluence and poverty and participant’s achievement and externalizing and internalizing behaviors depending on the timing of exposure. Our findings generally supported the early exposure and cumulative exposure models for achievement and to a lesser extent the adolescent exposure model for math achievement only. Results contribute to developmental theory and build upon prior research on neighborhood dynamics. Socioeconomic conditions in early childhood have been found to be critical to concurrent and later achievement (Duncan, Ziol-Guest, & Kalil, 2010). It was thus expected that associations between neighborhood SES and developmental outcomes would be strong during early childhood. In line with these expectations, results revealed that neighborhood affluence in early childhood was favorably associated with children’s math and reading achievement and internalizing symptoms at that Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 EXPOSURE TO NEIGHBORHOOD AFFLUENCE AND POVERTY time. However, this advantage endured to adolescence for reading achievement only, providing modest support for the carry-forward hypothesis. Overall, these findings are consistent with the limited neighborhood research on developmental timing (e.g., Wheaton & Clarke, 2003) as well as research on family poverty (Brooks Gunn & Duncan, 1997), as both literatures highlight the sensitivity of early childhood to socioeconomic influences. Although it was expected that the early exposure model would apply primarily to achievement outcomes, it is not surprising that it extended to internalizing problems as well. Prior research supports the notion that neighborhood affluence may play a protective role in children’s development of internalizing behaviors (Xue et al., 2005). Indeed, neighborhood advantage has been shown to support effective parenting behaviors, including the provision of stimulating experiences as well as parental warmth (e.g., Kohen, Brooks-Gunn, Leventhal, & Hertzman, 2002), which are conducive to both achievement and socioemotional functioning. Alternatively, the same institutional resources that promote children’s early achievement in affluent neighborhoods, such as quality preschool programs as well as recreational and social programs, may foster their socioemotional well-being (Dupe´re´ et al., 2010). The association between neighborhood affluence and developmental outcomes in early childhood reinforces other work highlighting the importance of socioeconomic contexts during early childhood for concurrent and subsequent development (Duncan & Brooks-Gunn, 1997; Shonkoff & Phillips, 2000); however our findings mainly point to current benefits and not ones that are carried forward (except for reading). Early neighborhood affluence may facilitate or limit exposure to social contexts that are relevant for the development and promotion of children’s school-readiness skills. Once children enter formal schooling, however, neighborhood influences may be mitigated by exposure to school contexts that are similar across large populations of children, as opposed to diverse and changing child care and preschool contexts that characterize children’s experiences in early childhood (Dearing, McCartney, & Taylor, 2009). In addition, early childhood trajectories may be reinforced, and possibly augmented, by subsequent contexts (Crosnoe, Leventhal, Wirth, Kim, & Pianta, 2010), but our results only supported this notion for children’s reading achievement. The benefits of neighborhood affluence also may carry forward to adolescence only for children’s reading because affluent neighborhoods’ resources such as libraries and enrichment programs may be especially relevant for early literacy skills (Neuman & Celano, 2001). The effect sizes for neighborhood affluence associations with children’s achievement and internalizing symptoms were small (Cohen, 1988), approximately 133 .08 to .10 for achievement and .07 for internalizing, comparable to those reported in the literature (Leventhal & Brooks-Gunn, 2000). Nonetheless, a comparison of effect sizes for background factors known to be associated with children’s achievement such as mother’s education, verbal ability, and family incometo-needs ratio reveals that the effect sizes for neighborhood affluence were comparable if not larger than other factors in this study (e.g., Bradley & Corwyn, 2002), suggesting that neighborhood affluence is an important context that should not be overlooked in studies of children’s achievement. Results provided some support for the cumulative exposure model, at least when it comes to neighborhood affluence and achievement. Findings indicated, in line with other studies (e.g., Crowder & South, 2011), that long-term exposure to neighborhood affluence, compared with exposure to low-decreasing or moderate neighborhood affluence, may be advantageous for adolescents’ achievement. Prolonged exposure to an advantaged neighborhood context in particular, compared with one marked by stagnant or declining affluence, may allow for an accumulation of benefits over time from high-quality resources that support learning in children’s everyday lives, notably childcare=preschools and schools (Heckman, 2008). It is notable that individuals exposed to the most affluent neighborhoods consistently (that is, starting in childhood) had better outcomes than those exposed to less affluent neighborhoods at some point during childhood or adolescence. Meanwhile, we found very limited support for the carry forward and adolescent exposure models. Even in the absence of consistent support for these models, and without sustained effects of early affluence, it may be that differences in achievement during adolescence are found only for those continuously exposed to the most affluent neighborhoods. Exposure to such neighborhoods in adolescence only may have been insufficient to shape development. Thus, the results suggest that exposure to affluent neighborhoods is likely most beneficial if that exposure is prolonged, perhaps similar to the way in which exposure to chronic (vs. transient) childhood poverty is associated with more deleterious outcomes (e.g., Najman et al., 2009). Unexpectedly, we found no evidence for a link between cumulative exposure to neighborhood poverty (vs. low levels of neighborhood poverty) and children’s externalizing or internalizing behaviors as expected and in line with prior work (e.g., Leventhal & Brooks Gunn, 2011). This finding could result from limited variation in neighborhood poverty, as this sample includes relatively few participants from highly disadvantaged neighborhoods (although standardized neighborhood poverty variables varied considerably). Our sample also was geographically diverse, whereas prior studies Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 134 ANDERSON ET AL. documenting associations between neighborhood poverty and children’s socioemotional development often rely on exclusively urban samples with greater concentrations of neighborhood disadvantage (e.g., Criss, Shaw, Moilanen, Hitchings, & Ingoldsby, 2009). Perhaps neighborhoods characterized by relatively low levels of disadvantage (even as compared with those with lower levels) maintain social cohesion and control and limit exposure to antisocial role models thought to underlie links between neighborhood poverty and adverse childhood outcomes (Sampson et al., 2002). In general, we found limited support for the adolescent exposure model, particularly with respect to neighborhood poverty and children’s behavior problems. This finding is surprising given the abundance of studies linking adolescent neighborhood characteristics and such outcomes (Leventhal et al., 2009). The lack of association may be explained by the fact that we examined adolescence up to ninth grade, or 15 years old, whereas exposure to neighborhood conditions may become more important later in adolescence as autonomy is further established. For example, research demonstrates that aggressive and antisocial behavior tends to peak around 17 years old (Dodge et al., 2007; Moffitt, 1993), an age excluded in our sample. In addition, controlling for prior exposure to neighborhood conditions may have restricted the variance in adolescent outcomes, a factor perhaps not accounted for in prior studies. However, models that included only adolescent neighborhood poverty were similar to those incorporating both the early childhood and adolescent neighborhood variables, which suggests that neighborhood conditions during adolescence may not by themselves contribute to concurrent development. As previously mentioned, results also could be due to the moderate levels of neighborhood poverty in our study, particularly during middle childhood and adolescence. Finally, for those adolescents residing in poor neighborhoods, the persistence of such conditions into adolescence may have a minimal connection to their functioning during early adolescence over and above prior exposure. Limitations should be noted, in addition to those already mentioned. First, our sample was geographically and economically diverse but was not nationally representative, precluding generalization to the U.S. population. Second, although we used a diverse set of covariates to adjust for issues of selection, there is no way to fully rule out the possibility that the associations attributed to neighborhood affluence and poverty were not due to other, unmeasured characteristics influencing both neighborhood choice and children’s outcomes (Leventhal & Brooks-Gunn, 2000; Tienda, 1991). Third, our data ended at ninth grade, or 15 years old, precluding generalizations to late adolescence and somewhat limiting generalizations that can be drawn for externalizing behaviors in particular. Finally, we acknowledge the persistent threat of selection bias; however, studies employing a variety of methodological techniques conclude that associations between neighborhood SES and child outcomes persist. These approaches include sibling fixed-effect models which hold family characteristics constant (Vartanian & Buck, 2005); instrumental variable analysis that minimize unmeasured correlations between neighborhood characteristics and child outcomes (Foster & McLanahan, 1996); behavior genetic models which differentiate between genetic and environmental influences (Caspi, Taylor, Moffitt, & Plomin, 2000); and propensity scoring methods which match children who do and do not live in certain types of neighborhoods (Harding, 2003). Our research question and available data were not amenable to employing these techniques; however, given the robustness of findings with other analyses, we are confident that employing theoretically-relevant covariates is a reasonable approach. Our findings have implications for future neighborhood research and policy. They point to the importance of developmental timing and duration of exposure. In our study, early childhood arose as a period when neighborhood conditions may matter for children’s development, but these associations may not endure into adolescence. These findings are consistent with research on family economic circumstances and highlight the importance of understanding the developmental significance of economic contexts in early childhood. Somewhat surprisingly, adolescence was not a developmental period during which neighborhood SES seemed to play a salient role, which conflicts with prior theoretical work. However, cumulative exposure to highly-resourced neighborhoods may confer achievement benefits in adolescence. Identifying the processes that account for the observed associations is a critical gap in understanding how the patterns arise, particularly across development, and a necessary next step for making recommendations for policy and practice. Other aspects of neighborhoods (e.g., institutional resources and collective efficacy) as well as parenting behaviors (e.g., home environment and monitoring)—shown to be important in explaining associations between neighborhood SES and children’s outcomes (Jencks & Mayer, 1990; Leventhal et al., 2009)—were beyond the scope of this study as relevant data were not consistently available across developmental periods, and future research will need to explore these proposed developmental pathways. We may anticipate, however, following prior work (Dupe´re´ et al., 2010), that neighborhood affluence is linked to children’s achievement through stimulating experiences in more proximal environments like the family, child care, and school. Finally, policy makers should be aware EXPOSURE TO NEIGHBORHOOD AFFLUENCE AND POVERTY that targeted neighborhood-based interventions may differentially benefit children at different periods of development. For example, our results suggests that investments in community resources such as tutoring programs for adolescents may have limited benefits if not accompanied by programs targeting young children as well. Clearly more research is required to make definitive recommendations, but growing evidence suggests that not all neighborhood characteristics matter for all children, at all times. Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 ACKNOWLEDGMENTS We gratefully acknowledge the data set provided by this study and express our appreciation to NICHD for support; to the study coordinators at each site who supervised data collection; to the research assistants who collected the data; and especially to the children, parents, and teachers who participated in this study. FUNDING Support was provided by the William T. Grant Foundation to the second author. 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(1989). Woodcock-Johnson PsychoEducational Battery - Revised. Allen, TX: DLM Teaching Resources. Wright, D. A. N. (1999). Student mobility: A negligible and confounded influence on student achievement. The Journal of Educational Research, 92(6), 347. Xue, Y., Leventhal, T., Brooks-Gunn, J., & Earls, F. J. (2005). Neighborhood residence and mental health problems of 5- to 11-year olds. Archives of General Psychiatry, 62, 554–563. APPENDIX A Correlations Among Neighborhood High and Poverty by Developmental Period Early Childhood Poverty Early Childhood Affluence Middle Childhood Poverty Affluence Early Adolescence Poverty Affluence Middle Childhood Affluence Poverty 0.683 0.419 0.192 0.646 0.515 0.582 0.365 0.163 0.598 0.797 0.438 Early Adolescence Affluence Poverty 0.451 0.913 0.496 0.202 Note. N ¼ 1,364. Results combined across 10 imputed dataset. p < .0001. 137 138 ANDERSON ET AL. APPENDIX B Correlations Among Neighborhood High and Poverty and Child Outcomes by Developmental Period Child Outcomes Math Achievement Downloaded by [Bibliothèques de l'Université de Montréal] at 11:13 27 August 2014 Neighborhood SES Early Poverty Proportion single moms Proportion HH < 100% poverty Proportion unemployed adult Early Affluence Proportion with B.A. Proportion with professional job Middle Poverty Proportion single moms Proportion HH < 100% poverty Proportion unemployed adult Middle Affluence Proportion with B.A. Proportion with professional job Adolescent Poverty Proportion single moms Proportion HH < 100% poverty Proportion unemployed adult Adolescent Affluence Proportion with B.A. Proportion with professional job Reading Achievement Externalizing Behavior Early Middle Adolescence Early Middle Adolescence .27 .28 .19 .30 .31 .20 .25 .30 .19 .22 .24 .16 .27 .28 .17 .27 .30 .22 .12 .14 .10 .13 .16 .09 .17 .18 .09 .29 .31 .26 .27 .32 .33 .32 .32 .29 .30 .32 .33 .17 .17 .18 .19 .16 .18 .26 .27 .13 .27 .29 .18 .26 .29 .20 .23 .18 .14 .25 .25 .16 .24 .23 .16 .13 .19 .12 .16 .22 .14 .15 .20 .10 .34 .35 .28 .29 .35 .34 .33 .33 .32 .32 .35 .35 .19 .19 .20 .22 .19 .20 .23 .24 .14 .24 .24 .15 .24 .25 .15 .17 .20 .11 .20 .21 .12 .22 .22 .14 .13 .18 .11 .16 .22 .15 .15 .19 .11 .32 .32 .26 .26 .34 .34 .32 .32 .32 .30 .33 .33 .19 .18 .21 .22 .19 .20 Note. N ¼ 1,364. Results combined across 10 imputed dataset. Early Middle Adolescence
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