Analyzing and Evaluating Rater-Mediated Assessments- 2 nd Revised and Updated Edition
Preface to the Second Edition
This second edition of my Introduction to Many-Facet Rasch Measurement is an extensive revision of the earlier book. I have been motivated by the many positive reactions from readers, and by learning that researchers and practitioners across wide-ranging fields of application are more than ever ready to address the perennial problems inherent in rater-mediated assessments building on a many-facet Rasch measurement approach.
In the present edition, I have revised and updated each chapter, expanded most chapters, and added a completely new chapter. Here I provide a brief outline of the major changes: Chapter 2 (“Rasch Measurement: The Basics”) discusses more deeply the fundamental, dichotomous Rasch model, elaborating on key terms such as latent variable, item information, and measurement invariance. Chapter 5 (“A Closer Look at the Rater Facet”) has been reorganized, dealing in a separate section with rater severity estimates and their precision; the section on rater fit statistics now includes a detailed discussion of the sample size issue. Further major amendments concern Chapter 6 (“Analyzing the Examinee Facet”), with new sections on examinee measurement results, examinee fit statistics, and criterion-specific score adjustment, and Chapter 7 (“Criteria and Scale Categories”), with new sections on criterion measurement results, manifest and latent rating scale structures, and indicators of rating scale quality. Chapter 8 (“Advanced Many-Facet Rasch Measurement”), probes more deeply into methods of confirmatory interaction analysis, focusing on approaches using dummy facets. The book now closes with Chapter 10 (“Summary and Conclusions”). In this chapter, I recapitulate relevant...
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