Objective-subjective socialization criterion can be used for psychological results of communication classification. Objective socialization represents external operational sides of behavior due to the character of subject's activity. Subject socialization means the realization of self as a subject of activity. The analysis of children's communication with the adults shows that the sense of community develops gradually and is realized by 3 years of age. This sense is based upon the child's need in joint activity with the adult. The communication is object-mediated in infancy and it is activity-mediated in early childhood.