A sample of 153 male police officers were subjects in a test validation study with two objectives: (1) to compare reliability estimates of a 16-item objective achievement examination scored by the conventional items right formula and by four different procedures; and (2) to obtain comparative concurrent validity coefficients of scores arising from…

The construct validity of a 17-item exploratory academic self-concept subscale derived from the Piers-Harris Chidlren's Self-Concept Scale was investigated. Its empirical factor structure and its correlation with two other academic self-concept instruments were analyzed. Research use only is recommended pending rewriting of this exploratory…

This book contains a collection of principles, methods, and strategies useful in the planning, design, and evaluation of studies in education and the behavioral sciences. It is not a technical, detailed study, but an overview, a summary of alternatives, an exhibit of models, and a listing of strengths and weaknesses, useful as a checking and…