On the reliability and validity of derived scores yielded by the McCall Multi-Mental Scale

Abstract

150 pupils in grades 4-6 in the Chula Vista, California, elementary school took the McCall Multi-Mental Scale twice. The Pearson r representing the degree of relationship between the two paired series of scores is .791 ± .021. The range in IQ score values on the first was 64-162, with a mean of 107.4 and a standard deviation of 18.4; on the second, 62-168 with a mean of 105.8 and a standard deviation of 20.3. (PsycInfo Database Record (c) 2025 APA, all rights reserved)