The author critically reviews the literature on the developmental approach to mental retardation by examining such aspects as motivation, interrupted tasks, probability learning, institutional effect, statistical problems, and Piagetian tasks; and questions whether there is a substantial body of valid evidence supporting claims of…

This paper presents a discussion of the importance of voluntary childlessness as a contemporary social phenomenon. The negative attitudes associated with voluntary childlessness are discussed in a brief summary of recent literature. An exploration of the methodological limitations of existing research is included which emphasizes its usefulness…