most of an infant's behavioral efforts in the first six months of his life involve his attempts to reduce inner tension originating from his inner drives. the infant's human needs to secure food, to climinate, and to experience personal warmth along with his physical comfort create the sources for learning.simultaneously, the way in which these innate needs are met introduces environmental learning experience. these nurturing experiences are increasingly related to the physiological stimulations until social learning becomes the prime instigator of behavior.it is this period of presocialization, the period of rudimentary asocial behavior which comprises the first phase