Reviews different approaches used over the past two decades to study early behavioral development in infants. Reviews research in areas as physical and cognitive development and the role of adult caretakers. (BD)

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…