A less extreme example of this phenomenon is familiar. Parents are often surprised to hear accounts of their children’s behavior at school, at a party, or in the home of a particular friend. Part of the surprise comes from the parents’ failure to appreciate the impact of the various social contexts on children in general. But part of their surprise comes from the fact that whenever they personally observe their child, they themselves are an important element in the child’s situation, producing more uniformity than would otherwise be the case.

