This study compared 29 females with Turner syndrome and 21 females with fragile X syndrome (ages 6-22) on a videotaped role-play interaction with 34 females in a comparison group. Three of eight behavioral measures of social skills differentiated the participant groups. Fragile-X subjects required more time to initiate interactions and Turner…

This study examines age and sex differences in nurturant behaviors displayed toward a male infant by 60 subjects, both male and female, from three age groups: preschoolers, preadolescents, and young adults. The infant was 12 months old at the onset of the study and 16 months when the testing was completed. Each subject was videotaped for seven…