Further Cross-Validities of the MOS and DAT Batteries

The MOS and DAT batteries both have been cross-validated against final marks at the end of the 10th grade. Using multiple regression equations derived in earlier studies, predictions were made of final marks attained by the cross-validation samples at the end of the 11th and 12th grades. Cross-validity coefficients determined by correlating the actual and predicted final marks attest to the greater relative efficiency of the MOS battery.

Cross-validities of the MOS and DAT batteries

The MOS and the DAT batteries have been shown previously to possess equal validity for predicting final marks in 10th grade English, Mathematics and Science. Using the multiple regression equations derived in an earlier study, predictions were made of final grades to be attained at the end of the sophomore year of 88 male and 65 female students drawn from an independent sample. Cross-validity coefficients determined by correlating the actual and predicted final marks support the original findings and attest to the greater relative efficiency of the MOS battery.

RELATIVE PREDICTIVE VALIDITIES OF MOS AND DAT BATTERIES FOR JUNIOR HIGH SCHOOL STUDENTS

The MOS Battery of 8 tests was administered to a sample of junior high school students along with the DAT Battery also consisting of 8 tests. The test-taking time for the MOS Battery is 42 min.; for the DAT Battery, it is 186 min. Multiple regression equations and multiple correlation coefficients were calculated for both batteries in predicting the final marks in Grades 8 and 9 of 88 male and 65 female students. The results, which were similar to those obtained in an earlier study conducted at the senior high school level, revealed that both batteries are essentially equally valid predictors of success in the basic academic courses of English, Mathematics, Science, and Social Studies. A difference in the results for the junior high school samples and senior high school samples of the previous investigation was noted in that memory for facts as measured by the MOS Memory Test and knowledge of good English Usage as measured by the DAT Sentence Test appear to influence the final grades of junior high school students more than they do those of the senior high school students.