Can Scores Obtained from the Slosson Intelligence Test be Used with as much Confidence as Scores Obtained from the Stanford-Binet Intelligence Scale?

This study was concerned with determining the validity of the Slosson Intelligence Test (SIT) using the Stanford-Binet Intelligence Scale (S-B), Form L-M as the validity criterion. The sample consisted of 724 students enrolled in 10 public school systems in northeastern Massachusetts. Using the Pearson-Product Moment formula a coefficient of correlation was computed separately for each of 21 categories. Also, the average absolute difference between IQ scores from the two scales was computed for each of the 21 categories. Results showed the correlation between the S-B and SIT to be .92. The overall study average absolute IQ score point difference was 5.46 (range 4.03-5.88), which is approximately the same as the standard error of measurement of 5 IQ score points of the S-B. The findings suggest that the SIT can be used as a valid screening and retesting substitute for the S-B. (Author/AE)