Being asked to give the Charles H. McCloy research lecture is one of the highlights of the author's academic career. Although McCloy's primary area of expertise was measurement and the analysis of motor skills, he also shared an avid interest in youth development through sport and physical activity. In this article, the author features youth sport…

Nineteen socially isolated preschool children were exposed either to four videotapes in which social skills were modeled (treatment) or to four sequences of a nature film (control). Observations indicated that treatment produced increases in the frequency with which subjects dispensed and received social reinforcement and the frequency of social…