Abstract Abstract: Questions of how young children use "age" groups to understand the social world led to 2 studies exploring the content of preschool children's age group labels and categories.Study 1 included 32 children aged 2-4 years and determined spontaneous labels for both photographs and dolls representing the life span. Results indicated that children readily labeled all ages using a relatively limited set of terms, but showed less patterned labeling of stimuli representing adults than children. Girls' labels were more structured than boys'. Older preschoolers showed more differentiated structures than did younger ones and used more kinship terms as labels. Study 2, on 84 children aged 3-5, was a photograph-sorting task that determined the points of transition between age categories as well as subjects' own self-identification by age group. Results indicated that preschoolers used a nonadult method of dividing up the life span.Older children made fewer errors. Age self-identification was congruent with how children sorted photos of unfamiliar peers. However, younger boys and girls differed in their self-identification, perhaps reflecting differences in gender identification processes.ow to make sense of the immensely diverse and dynamic human world around them is a task that faces all young children as they seek to understand social interaction and to gain predictable responses from others. Recent research has shown that even infants and toddlers have more elaborate social networks than was previously realized, comprising relationships with mother, father, siblings, and peers; and certainly by preschool age most youngsters encounter on an almost daily basis a broad array of familiar and unfamiliar people in many different kinds of settings. Yet, because most of the category systems that are important to adults, such as occupation, social class, and ethnic, political, and community affiliation, are too abstract (Furth, 1980), the young child is forced to rely on social categories related to only the most static and overt cues. Hence age, gender, and familiarity are the attrib-