8 subtests of the Iowa Tests of Basic Skills were administered to a group of 80 black third grade children of lower socio-economic status and to a matched sample of 80 children who had been involved 5 yr. previously in a Headstart program. Separate subtest-by-subtest intercorrelational matrices were then factored and coefficients of congruence calculated. Previous Headstart experience was not related to any factor structure changes on this test.
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