27 two-yr.-old infants and their mothers were studied in their homes to analyze the relationship between infants' development and their home environment, mothers' attitudes as parents, mothers' marital adjustment, and families' socioeconomic status. Bayley Mental Development Indexes correlated with the infants' home environment, families' socioeconomic status, and maternal attitudes. Bayley Psychomotor Development Indexes related to home environment and socioeconomic status. Home environment, maternal attitude, and marital adjustment scores correlated with socioeconomic status. The implications of these ecological factors on infants' mental and motor development are discussed.
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