Bayley's major contributions to developmental psychology are reviewed. These include her concern with measurement and methodology and her early anticipation of such topics as behavior genetics. Her work in such areas as androgyny and body build, motor and mental development, and maternal and child behaviors is summarized. (LB)

In a study to determine whether or not culturally deprived children develop at progressively greater deficits in intellectual functioning during the ages of 15 months to 3 years, tutors provided 15-month-old infants with intellectual and verbal stimulation one hour daily, five times a week until they were 36 months old. The subjects consisted of…