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Petscher, Yaacov; Pfeiffer, Steven I. – Assessment for Effective Intervention, 2020
The authors evaluated measurement-level, factor-level, item-level, and scale-level revisions to the "Gifted Rating Scales-School Form" (GRS-S). Measurement-level considerations tested the extent to which treating the Likert-type scale rating as categorical or continuous produced different fit across unidimensional, correlated trait, and…
Descriptors: Psychometrics, Academically Gifted, Rating Scales, Factor Structure
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Pentimonti, Jill M.; Zucker, Tricia A.; Justice, Laura M.; Petscher, Yaacov; Piasta, Shayne B.; Kaderavek, Joan N. – Early Childhood Research Quarterly, 2012
Participation in shared-reading experiences is associated with children's language and literacy outcomes, yet few standardized assessments of shared-reading quality exist. The purpose of this study was to describe the psychometric characteristics of the Systematic Assessment of Book Reading (SABR), an observational tool designed to characterize…
Descriptors: Test Validity, Construct Validity, Interrater Reliability, Factor Structure
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Petscher, Yaacov; Connor, Carol McDonald; Al Otaiba, Stephanie – Assessment for Effective Intervention, 2012
This study investigated the psychometrics of the "Diagnostic Evaluation of Language Variation-Screening Test" (DELV-S) test using confirmatory factor analysis, item response theory, and differential item functioning (DIF). Responses from 1,764 students in kindergarten through second grade were used in the study, with results indicating…
Descriptors: Diagnostic Tests, Screening Tests, Language Variation, Psychometrics