Body language and facial gesture provide sufficient visual information to support high-level social inferences from "thin slices" of behavior. Given short movies of nonverbal behavior, adults make reliable judgments in a large number of tasks. Here we find that the high precision of adults' nonverbal social perception depends on the slow…

Compared the collaborative patterns of seven- and five-year-old expert planners working with five-year-old novice planners on tasks requiring reverse sequencing strategies. Results suggest that cognitive gains are achieved when children collaborate with peers more expert than themselves in problem-solving activities. (MM)