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Direct linkWyse, Adam E.; Dean, Vincent J.; Viger, Steven G.; Vansickle, Timothy R. – Applied Measurement in Education, 2013
The development of alternate assessments for students with disabilities plays a pivotal role in state and national accountability systems. An important assumption in the use of alternate assessments in these accountability systems is that scores are comparable on different test forms across diverse groups of students over time. The use of test…
Descriptors: Equated Scores, Alternative Assessment, Disabilities, Case Studies
Download full textLee, Guemin; Fitzpatrick, Anne R. – Asia Pacific Education Review, 2008
Because parameter estimates from different calibration runs under the IRT model are linearly related, a linear equation can convert IRT parameter estimates onto another scale metric without changing the probability of a correct response (Kolen & Brennan, 1995, 2004). This study was designed to explore a new approach to finding a linear…
Descriptors: Equated Scores, Item Response Theory, Models, Equations (Mathematics)
