A comparison of the Stanford-Binet, Revised Form I, and the California Test of Mental Maturity (S-Form)

In a study of 422 pupils, grades 1-12, no significant differences appeared between the means of the California Test of Mental Maturity and the Binet. The Binet distribution was skewed significantly but the Mental Maturity test results were not. At the upper Binet levels, Binet scores are higher than those of the California test. At and below the average range, the California test yields a higher IQ. The California test gives scores higher than the Binet at the 6 and 7-year level, while the Binet is higher at ages 9, 10, and 11. Scores are in greatest agreement at the 8-year old level. The greatest difference in IQ scores between the two tests occurs in the ten-year old groups. (PsycINFO Database Record (c) 2016 APA, all rights reserved)