Adoption of new instructional standards in science demands high-quality information about classroom practice. Teacher portfolios can be used to assess instructional practice and support teacher self-reflection anchored in authentic evidence from classrooms. This study investigated a new type of electronic portfolio tool that allows efficient…

This study utilizes an argument-based approach to validation to examine the implications of reliability in order to further differentiate the concepts of score and decision consistency. In a methodological example, the framework of generalizability theory was used to estimate appropriate indices of score consistency and evaluations of the…

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…

When validating assessment models built with data mining, generalization is typically tested at the student-level, where models are tested on new students. This approach, though, may fail to find cases where model performance suffers if other aspects of those cases relevant to prediction are not well represented. We explore this here by testing if…

Introduces the articles of this theme issue focusing on performance assessment methodology. Papers address: (1) merging item formats; (2) scoring models; (3) equating and linking; (4) generalizability theory; (5) standard setting methods; and (6) validity issues and methods. (SLD)

Increasing emphasis on assessment and concern about assessment techniques have stirred interest in alternative assessment forms, for which evidence is needed about consequences, transfer of performance on specific assessment tests, and assessment fairness. Criteria concerning consequences, fairness, transfer-generalizability, cognitive complexity,…