Predictive validity of the Differential Aptitude Test (DAT) was investigated by comparing the DAT scores obtained by students in Grade 9 against their achievement in Grade 12 departmental examinations. Results indicated that the DAT has good predictive power and can be used effectively on a selective basis for counseling and predictive purposes in…

Double cross-validation of a test battery against multiple criterion variables found the first general factor accounts for most criterion variance in cross-validated regression weights. Small contributions are made by mechanical/technical and psychomotor factors. It appears a common general factor plays the major role in validity for a range of…

This study determined the degree to which the Non-Language Test of Verbal Intelligence, developed to measure verbal ability through a nonlanguage medium, could measure verbal intelligence. Correlation with the Differential Aptitude Test-Verbal suggested the existence of some common, as well as some uncommon, factors between the two tests.…

This study was part of a longitudinal research project to establish the validity of the Ball Aptitude Battery (BAB) relative to various academic criteria. The BAB is a multiple ability test battery of specific work skills for use in career counseling. Previous research has demonstrated that adequate validity coefficients exist for both job…

To improve vocational rehabilitation programs for schizophrenic persons, a project sought to design an effective assessment strategy. Inactive records of schizophrenic clients at New Jersey sheltered workshops were examined to determine validity and reliability of assessment instruments being used. General Aptitude Test Battery (GATB) profiles of…