WISC-R factor structures among Anglos, Blacks, Chicanos, and Native-American Papagos.

Compared WISC-R factor structures for Anglo, Black, Chicano, and Native-American Papago children from Pima County, Arizona. The samples were randomly selected from school enrollment rosters and stratified by ethnicity, grade level (1st, 3rd, 5th, 7th, and 9th), sex, and urban–rural residence (950 Ss). Application of 2 objective procedures for determining the appropriate number of factors for each group suggested a 3-factor solution for Anglos, a 2- or 3-factor solution for Chicanos depending on procedure used, and 2-factor solutions for Blacks and Native-American Papagos. The 2-factor solutions were highly similar for the 4 groups. The 3-factor solutions were similar for Anglos and Chicanos but were substantially different for the other groups. The groups were highly similar in terms of the proportion of variance accounted for by a general factor, and the Verbal–Performance scale distinction appeared equally appropriate for all groups. (PsycINFO Database Record (c) 2010 APA, all rights reserved)