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Direct linkHuang, Chiungjung – Educational and Psychological Measurement, 2009
This study examined the percentage of task-sampling variability in performance assessment via a meta-analysis. In total, 50 studies containing 130 independent data sets were analyzed. Overall results indicate that the percentage of variance for (a) differential difficulty of task was roughly 12% and (b) examinee's differential performance of the…
Descriptors: Test Bias, Research Design, Performance Based Assessment, Performance Tests
Download full textBetebenner, Damian W. – 1998
The zeitgeist for reform in education precipitated a number of changes in assessment. Among these are performance assessments, sometimes linked to "high stakes" accountability decisions. In some instances, the trustworthiness of these decisions is based on variance components and error variances derived through generalizability theory.…
Descriptors: Accountability, Educational Change, Error of Measurement, Generalizability Theory
Peer reviewedRock, Donald A.; Nelson, Jennifer – Journal of Educational Statistics, 1992
Several developments growing out of the National Assessment of Educational Progress (NAEP) are reviewed, with a discussion of their extension and application to other projects. These developments include: (1) complex matrix item sampling designs; (2) performance-based items in large-scale assessments; (3) vertical scaling; and (4) innovative…
Descriptors: Computer Assisted Testing, Educational Assessment, Elementary Secondary Education, Evaluation Methods
