First 6 months they touch and look at each other and as responsive to each other s behavior. Second half of life infants begin to recognize a per as a social partner. Show the ability to interact in groups and to be involved with more than one person at the same time. They develop competence in interacting with peers, they shift toward increased social play and exhibit a clear preference for playing with peers rather than adults. Mothers tend to bear the larger responsibility for maintaining the interaction, whereas in exchanges between infants and peers, the 2 partners contribute more equally. When children engage in positive social interactions they are more likely to smile or laugh or display other kinds of appropriate positive affect and their interactions lasts longer. The complexity of toddle play increases over age p. 469 table 12-1. Toddlers who frequently initiate conflicts with peers were also the most sociable and the most likely to initiate interactions.