Eckes, Thomas Introduction to Many

Eckes, Thomas
Introduction to Many-Facet Rasch Measurement
Analyzing and Evaluating Rater-Mediated Assessments
nd
2 Revised and Updated Edition
Frankfurt am Main, Berlin, Bern, Bruxelles, New York, Oxford, Wien, 2015. 241 pp.
Language Testing and Evaluation. Vol. 22
Edited by Rüdiger Grotjahn and Günther Sigott
Print:
ISBN 978-3-631-65615-0 hb. (Hardcover)
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Über das Buch
Since the early days of performance assessment, human ratings have been subject to various forms of error and bias. Expert raters often come
up with different ratings for the very same performance and it seems that assessment outcomes largely depend upon which raters happen to
assign the rating. This book provides an introduction to many-facet Rasch measurement (MFRM), a psychometric approach that establishes
a coherent framework for drawing reliable, valid, and fair inferences from rater-mediated assessments, thus answering the problem of fallible
human ratings. Revised and updated throughout, the Second Edition includes a stronger focus on the Facets computer program, emphasizing
the pivotal role that MFRM plays for validating the interpretations and uses of assessment outcomes.
Inhalt
Contents: Conceptual-psychometric framework for rater-mediated assessments – Principles of many-facet Rasch measurement – Measurement
of rater severity/leniency – Correcting examinee proficiency measures for rater severity differences – Examining rater consistency and rating
scale effectiveness – Increasing validity and fairness of performance assessments.
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