A study of intelligence testing, classification testing, and clerical aptitude and mechanical aptitude testing, in a military setting

William Fawcett Hill
1950
The purpose of this study was to investigate certain psychometric procedures, and to ascertain their value in relation to the problems of selection and prediction for clerical and mechanical trades in the service. The tests selected were the Otis S-A (which were also marked for twenty minute performance as well as the standard thirty), the Wonderlic Personnel R Test, the SRA Primary Mental Abilities Test, the Detroit Mechanical Aptitude Test and the Detroit Clerical Aptitude Test. Included in
more » ... Test. Included in the study were the marks obtained on a service-administered Classification Test - the Navy "G". The samples that were used were New Entry Trainees in the Canadian Navy who were about to take courses either as Writers (clerical trade) or Stokers (mechanical trade). The criterion used to evaluate the tests was the course marks obtained by the Stokers and Writers on their final examination. The tests were analyzed individually for types of distribution and amount of dispersion or variability. All the tests and subtests were correlated with the criterion to obtain validity coefficients. Similarly all the tests and subtests were correlated with the Otis, and intercorrelations were worked out for all the intelligence and classification tests. Multiple correlations of prediction were also calculated. The tests of the Primary Mental Abilities Test were intercorrelated for independence of "factors". The validity correlations found were low but were considered to have practical significance. The lowness of the correlations was probably due to the restrictions placed on the sample by the effects of enlistment qualifications. It was found that the twelve minute intelligence test, the Wonderlic, was apparently as good a measure of prediction as the thirty minute Otis. In the Primary Mental Abilities Test, the Number Test, proved to be the best measure of prediction of any test or subtest for Stokers, and with the Reasoning Test was predictive of success in the Stokers' course. It also was the only test of the PMA which showed any possibi [...]
doi:10.14288/1.0106808 fatcat:4k22wyudqzdapoytk6aeal2mni