Differentiation of abilities, socioeconomic status, and the WISC.

The study investigated the effect of an increase in age on the factor structures of the subtests of the WISC, and the relationship between subtest scores and socioeconomic status (SES). The scores of 70 Ss, tested at ages 10 and 12, were factor analyzed and structures at the 2 age levels compared. The sample was also divided into high and low SES groups, and subtest means calculated for each group. At both age levels, between-group mean differences were significant at or beyond the .05 level of confidence in the case of verbal subtests, while factor structures, which were similar, indicated a trend towards integration of abilities. The structures defined 2 main factors, identified as verbal and performance IQ, respectively. (31 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)