Middle-class children, divided by age, sex, and the presence/absence of younger siblings in the family, were studied to assess their interest in babies. The findings support MacDonald's contention that birth order effects are best understood as distinctive for each sex, especially when the behaviors investigated are sex-related. (Author/GC)

This study was designed to investigate male and female interest in babies at middle childhood and adolescence. A total of 64 middle class subjects (half 8- to 9-years-olds, half 14- to 15-year-olds) were observed individually in a 6-minute waiting room situation with an unfamiliar 6- to 10-month-old baby and mother (confederate). While the subject…

Interest in babies was assessed for 32 children aged 8 to 9 years and 32 children aged 14 to 15 years. Data were collected by means of a 6-second time sampling of waiting room behaviors in the presence of a live baby and by reactions to pictures of babies versus other objects. (Author/JMB)