Grandmothers' responsibility in raising two-year olds facilitates their grandchildren's adaptive behavior: a preliminary intrafamilial investigation of mothers' and maternal grandmothers' effects.

To investigate the extent to which the presence of their maternal grandmother might facilitate independent and adaptive responding, 2-year-old children were observed in a novel environment. Although the two-year-olds' extent of exploration and amount of time spent in a playroom were significantly grater when their mother was present than when an unfamiliar person was present, the grandmother's functional characteristics were on an intermediate level between those of the mother and those of the unfamiliar person. However, the more responsibilities that grandmothers reported customarily assuming for their grandchildren, the more similarly the children in the playroom reacted to their mothers and grandmothers. Extended involvement by a sensitive grandmother may enhance her grandchild's relationship with her.