In this study, we examined the scoring and generalizability assumptions of an explicit instruction (EI) special education teacher observation protocol using many-faceted Rasch measurement (MFRM). Video observations of classroom instruction from 48 special education teachers across four states were collected. External raters (n = 20) were trained…

In this study, we examined the scoring and generalizability assumptions of an Explicit Instruction (EI) special education teacher observation protocol using many-faceted Rasch measurement (MFRM). Video observations of classroom instruction from 48 special education teachers across four states were collected. External raters (n = 20) were trained…

As a property of test scores, reliability/dependability constitutes an important psychometric consideration, and it underpins the validity of measurement results. A review of interpreter certification performance tests (ICPTs) reveals that (a) although reliability/dependability checking has been recognized as an important concern, its theoretical…

Despite considerable interest in the topic of instructional quality in research as well as practice, little is known about the quality of its assessment. Using generalizability analysis as well as content analysis, the present study investigates how reliably and validly instructional quality is measured by observer ratings. Twelve trained raters…

In the first part of this article, the use of Generalizability (G) theory in examining the dependability of concept map assessment scores and designing a concept map assessment for a particular practical application is discussed. In the second part, the application of G theory is demonstrated by comparing the technical qualities of two frequently…

Previous efforts to investigate the equivalence of rating sources for job analysis ratings have reported conflicting results. In the present research, correlational and generalizability analyses were conducted to examine the equivalency of rating sources for over 70 state civil service job classifications. Incumbent and supervisor ratings (N=697)…

Many studies have indicated that at least 2 raters should score writing assessments to improve interrater reliability. However, even for assessments that characteristically demonstrate high levels of rater agreement, 2 raters of the same essay can occasionally report different, or discrepant, scores. If a single score, typically referred to as an…

The evidence for the psychometric adequacy of behavioral interviews in terms of traditional psychometric theory and generalizability theory are reviewed. The review resulted in the conclusion that behavioral interviews have some evidence for interrater reliability, content validity, and criterion-related validity. Additional research in several…

This study used generalizability theory and other statistical concepts to assess the application of the Angoff method to setting cutoff scores on two professional certification tests. A panel of ten judges gave pre- and post-feedback Angoff probability ratings of items of two forms of a professional certification test, and another panel of nine…