Combining teacher observations with test data using a mixed fixed/random psychometric model

• In Event: Item Response Theory

Abstract

We present findings from a multi-year study, where we merge teachers’ in-class observations (treated as random items), with item responses to pre- and post-tests (treated as fixed items). For content/interpretation this is based on a construct maps across the two modes. For analysis we use the mixed fixed/random-item IRT model.

Authors

• Mark Wilson, Berkeley School of Education, UC BERKELEY

• Perman Gochyyev, UNIVERSITY OF CALIFORNIA, BERK