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In 2 earlier investigations, we found that scores on the HOME Inventory administered during the first 2 years of life were substantially correlated with intelligence test scores at ages 3 and 4 1/2. In the current investigation, HOME scores in first 2 years showed similar relations to SRA Achievement Test scores during the first grade. In general, findings from this study were like those from the earlier investigations except that the subscale, "maternal responsivity," showed a weaker relation to achievement than IQ; while the "variety of stimulation" scale showed a stronger relation. Of all the HOME subscales, "play materials" revealed the strongest correlation with first-grade achievement. When 12-month Bayley MDI scores were partialed out of the HOME/achievement relation, little reduction was noted in the magnitude of the correlation; however, when 3-year IQ or subsequent HOME scores were partialed out, little residual correlation was noted.
Bradley et al. (1984) studied this question.