Experimental psychology is witnessing an increase in research on individual differences, which requires the development of new tasks that can reliably assess variations among participants. To do this, cognitive researchers need statistical methods that many researchers have not learned during their training. The lack of expertise can pose…

Criterion-referenced testing is defined and some of its background is discussed. A distinction is made between criterion-referenced scores, norm-referenced scores, cut-off scores, criterion scores, criterion variables, and content-standard scores. The relationship between norm-referenced information and criterion-referenced information is…