Studies on learning in infants show that in infancy every month of life represents a new level of learning. The functional state of the central nervous system can be influenced by physiological factors which cause fluctuating changes in functions important for learning. Once a stimulus becomes a conditioned signal, it acquires strong power in…

The work of four task forces on human deprivation is reported. Aspects of deprivation treated include psychosocial deprivation and personality development; influences of biological, psychological, and social deprivations upon learning and performance; socialization and social structure; and biological substrates of development and behavior. For…