Eighty undergraduates were administered four self-report locus of control inventories, in order to evaluate the convergent and discriminant validity of four categories common to these inventories: chance, fate, personal control, and powerful others. The four inventories were: (1) Internal, Powerful Others and Chance scales; (2) James Internal…

A procedure for predicting categorical outcomes using categorical predictor variables was described by Moonan. This paper describes a related technique which uses prior probabilities, updated by joint likelihoods, as classification criteria. The procedure differs from Moonan's in that the outcome having the greatest posterior probability is…

Developmental psychologists have not traditionally documented the psychometric properties of their observational instruments, partly because such concepts as reliability and validity are associated mainly with paper-and-pencil tests. A multitrait-multimethod correlation matrix (MTMM) was presented as a useful method for the psychometric evaluation…

Research was conducted that initially focused on identifying and synthesizing the large number of previously identified vocational special needs teacher competencies into an educational model. The model contained a matrix that organized all these competencies into twelve domains of four performance phases each. The Competency Matrix was the…