JL Frost, SC Wortham, S Reifel :Social development in the preschool years permits young children to include others in their pretend and dramatic play. Whereas infants and toddlers use their ability to symbolize in solitary play, preschoolers use their expanded cognitive and social abilities to play with their peers (Bretherton, 1985). In this section, some aspects of social play that contribute to social development and vice versa are discussed. The characteristics include understanding the developmental levels of social play, play and social competence, the expression of emotions or feelings through play, and sociodramatic play.Developmental Levels of Social PlayWe are indebted to the work of Parten (1932) in observing and describing how social play develops in preschool children. In her studies of young children, Parten observed that social play increases with age. She described development of social play into six categories: unoccupied behavior, onlooker behavior, solitary play, parallel play, associative play, and cooperative play. The first two categories are considered to be nonplay behavior, and the last three categories are indicators of social participation (Berk, 2002; Caster, 1984; Frost, 1992). Frost (1992) defines the six categories as follows:Unoccupied Behavior. The child is not playing but occupies herself with watching anything that happens to be of momentary interest. When there is nothing exciting taking place, she plays with her own body, gets on and off chairs, just stands around, follows the teacher, or sits in one spot glancing around the room (playground).Onlooker Behavior. The child spends most of her time watching the other children play. She often talks to the children being observed, asks questions or give suggestions, but does not overtly enter into the play. This type differs from unoccupied in that the onlooker is definitely observing particular groups of children rather than anything that happens to be exciting. The child stands or sits within speaking distance from other children.Solitary Play. The child plays alone and independently with toys that are different from those used by the children within speaking distance and makes no effort to get close to other children. He pursues his own activity without reference to what others are doing.Parallel Play. The child plays independently, but the activity chosen naturally brings her among other children. She plays with toys that are like those the children around her are using but she plays with the toys as she sees fit, and does not try to influence or modify the activity of the children near her. She plays beside rather than with the other children. (To be continued)