some post high school education. Only 3% had not graduated from high school. All of the mothers were residing with the father of the infant in the study at the time of recruitment. Eighty-eight percent of the participants were married to each other, 10% had never been married, and 2% had previously been married. Mothers' ages ranged from 20 to 41 years (M=30.8, SD=4.40) and fathers' ages ranged from 21 to 58 years (M=33.09, SD=5.89). Average family income for participating families was about US $43,000.
