According to
George Butterworth and Margaret Harris, during
childhood, one is usually unable to distinguish between what is
subjective and
objective.
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 reinforcing the child's current activity. He theorized that as the child matures cognitively and socially the amount of egocentric speech used would be reduced. It is thought that Piaget overestimated the extent of egocentrism in children. Egocentrism is thus the child's inability to see other people's viewpoints, not to be confused with selfishness. The child at this stage of
cognitive development assumes that their view of the world is the same as other people's. In addition, a more well-known experiment by Wimmer and Perner (1983) called the false-belief task demonstrates how children show their acquisition of theory of mind (ToM) as early as 4 years old. In this task, children see a scenario where one character hides a marble in a basket, walks out of the scene, and another character that is present takes out the marble and puts it in a box. Knowing that the first character did not see the switching task, children were asked to predict where the first character would look to find the marble. The results show that children younger than 4 answer that the character would look inside the box, because they have the superior knowledge of where the marble actually is. It shows egocentric thinking in early childhood because they thought that even if the character itself did not see the entire scenario, it has the same amount of knowledge as they did, and therefore should look inside the box to find the marble. As children start to acquire ToM, their ability to recognize and process others' beliefs and values overrides the natural tendency to be egocentric. ==During adolescence==