This paper is about egocentrism and its relationship to certain socialization variables. The 219 subjects in grades I through 5 were from two rural communities in southern Illinois. It was expected that the study would support Piaget's theory on egocentrism. The most significant results were the high correlations of egocentrism scores, of sociometric scores, and of teachers' ratings of popularity with observed playground behaviors. THE objective of this research was to investigate egocentrism and interrelationships among egocentrism, popularity, and certain playground behaviors for students in grades 1 through 5.Egocentrism is a construct which reflects an individual's inability to differentiate &dquo;self from that which is &dquo;not self.&dquo; Jean Piaget (1972) has observed that a child's universe is at first undifferentiated and that young children do not know that there is a universe of thought different and separate from their own. Their conceptions of reality are based only on their own points of view. These children essentially cannot place themselves at another's perspective and, therefore, cannot anticipate how others will react to what they say or do. Consequently, egocentric children may become unpopular from expressing self-centered behaviors that their peer groups view as unacceptable.Several investigators (Alvy, 1968;Sullivan, 1967;Weinheimer, 1972) have found that egocentrism decreases with age. Rubin (1972, 1973) observed that popularity and communicative egocentrism were related in grades K, 1, and 2. To the writer's knowledge, no one has previously