Tested a proposed developmental pathway for toddlers' mastery of skills in generating non-ritualized forms of cooperative coordinated action with peers. Studied nonverbal imitative acts among U.S. toddlers and toddlers of the Seltaman people of Papua New Guinea. Found that ready imitation of one another emerged during the same developmental period…

The paper defines and discusses various social learning theories. Central to most theories of how an individual acquires socially acceptable behaviors are the processes of imitation, or observational learning, and identification, or modeling. The effectiveness of each process is noted. (SB)