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Direct linkSideridis, Georgios D.; Tsaousis, Ioannis; Al-Sadaawi, Abdullah – Educational and Psychological Measurement, 2019
The purpose of the present study was to apply the methodology developed by Raykov on modeling item-specific variance for the measurement of internal consistency reliability with longitudinal data. Participants were a randomly selected sample of 500 individuals who took on a professional qualifications test in Saudi Arabia over four different…
Descriptors: Test Reliability, Test Items, Longitudinal Studies, Foreign Countries
Dimitrov, Dimiter M. – Educational and Psychological Measurement, 2016
This article describes an approach to test scoring, referred to as "delta scoring" (D-scoring), for tests with dichotomously scored items. The D-scoring uses information from item response theory (IRT) calibration to facilitate computations and interpretations in the context of large-scale assessments. The D-score is computed from the…
Descriptors: Scoring, Equated Scores, Test Items, Measurement
