One of the proposed uses of cognitive diagnostic assessments is to classify the examinees as either masters or nonmasters on each of a number of skills being assessed. As with any test, it is important to report the quality of these binary classifications with measures of their reliability. Cui et al. and Wang et al. have suggested reliability…

Classification consistency and accuracy are viewed as important indicators for evaluating the reliability and validity of classification results in cognitive diagnostic assessment (CDA). Pattern-level classification consistency and accuracy indices were introduced by Cui, Gierl, and Chang. However, the indices at the attribute level have not yet…

The Springs task, an individually administered measure of ability to criticize and control experiments, is described. The task has characteristics similar to Inhelder and Piaget's Bending Rods task; it yields scores on naming variables, controlling variables, and analyzing experiments. (See also RIE: ED 163 092.) (JKS)