A three-dimensional theory of frustration-aggression is presented. It is proposed that aggressiveness can be measured by computing the kinetic energy of a response. Aggressiveness is equated with energy state. Experimental and laboratory procedures are outlined. (Author/BEF)

Reviews the theory and research on the physiological or genetic origins of parenting behavior, noting that an ethological or evolutionary analysis of parenting behavior supports the idea that primates, including man, have evolved psychological structures which are particularly adapted to respond to cues from young children. (Author/JM)

Maintains that the "getting into shape" hypothesis of explaining the inverted-U distribution of exercise play across age is likely incorrect. Argues that the biological study of human physical activity play, as recommended by Pellegrini and Smith (1998), will reveal whether physical activity play represents an example of…

This paper argues that the emerging discipline of sociobiology has the potential of doing what epistemologists, developmental psychologists, psychoanalysts, and ethologists have been unable to do: to provide a theory documenting our inherited dispositions as reflected in cultural evolution and personal development. Accordingly, the paper begins…

The author's purpose in this article is to discuss the aspects of language (especially the development of language in children) to which biological concepts are most appropriately applied. While results of past studies would seem to show that language development is contingent on specific language training, it is important to distinguish between…