Consider test data, a specified set of dichotomous skills measured by the test, and an IRT cognitive diagnosis model (ICDM). Statistical estimation of the data set using the ICDM can provide examinee estimates of mastery for these skills, referred to generally as attributes. With such detailed information about each examinee, future instruction…

Measures of teacher behavior are related to student achievement in fifth grade reading and mathematics instruction. It was found that those measures of teacher behavior which were generalizable (that is, more highly reliable) were found to be significantly related to student achievement. (JKS)