part, they looked at the experimenter's action much longer when she reached for the box opposite to the one she originally put the toy in. Not only does this show the existence of infants' memory capacity, but it also demonstrates how they have expectations based on their knowledge, as they are surprised when those expectations are not met. Piaget explained that egocentrism during infancy does not mean selfishness, self-centeredness, or egotism because it refers to the infant's understanding of the world in terms of their own motor activity as well as an inability to understand it. In children's social development, the infancy is the period where the individual performs very few social functions due to the conscious and subconscious concern with the fulfillment of physical needs. During childhood According to George Butterworth and Margaret Harris, during childhood, one is usually unable to distinguish between what is subjective and objective. According to Piaget, "an egocentric child assumes that other people see, hear, and feel exactly the same as the child does." Jean Piaget (1896–1980) developed a theory about the development of human intelligence, describing the stages of cognitive development. He claimed that early childhood is the time of pre-operational thought, characterized by children's inability to process logical thought. According to Piaget, one of the main obstacles to logic that children possess includes centration, "the tendency to focus on one aspect of a situation to the exclusion of others." A particular type of centration is egocentrism – literally, "self-centeredness." Piaget claimed that young children are egocentric, capable of contemplating the world only from their personal perspective. For example, a three-year-old presented his mother a model truck as her birthday present; "he had carefully wrapped the present and gave it to his mother with an expression that clearly showed he expected her to love it." The three-year-old boy had not chosen the present out of selfishness or greediness, but he simply failed to realize that, from his mother's perspective, she might not enjoy the model car as much as he would. Piaget was concerned with two aspects of egocentricity in children: language and morality. He believed that egocentric children use language primarily for communication with oneself. Piaget observed that children would talk to themselves during play, and this egocentric speech was merely the child's thoughts. He believed that this speech had no special function; it was used as a way of accompanying and