Discusses the logic of the rule-space model (K. Tatsuoka, 1983) as it applies to test development and analysis. The rule-space model is a statistical method for classifying examinees' test item responses into a set of attribute-mastery patterns associated with different cognitive skills. Directs readers to a tutorial that may be downloaded. (SLD)

This National Council on Measurement in Education (NCME) module is designed to help teachers understand test reliability requirements. Focus is on the reliability of scores from teacher-made achievement tests used for interpreting norm-referenced scores. Reliability, factors affecting scores, reliability estimation methods, reliability's relation…

The framework and procedures of generalizability theory are introduced and illustrated in this instructional module that uses a hypothetical scenario involving writing proficiency. Generalizability analyses are useful for understanding the relative importance of various sources of error and for designing efficient measurement procedures. (SLD)