Ontogeny of behavior in mice selected for large size

Development of 13 reflex responses and behavioral components of mice from the Goodale Giant inbred strain (G/Gw) was compared to that of a sample of 61 pups from a random-bred strain. Significant differences were observed between groups for several responses, but the direction of these differences was not consistent. Effects of rapid growth and increased size in G/Gw mice did not directly affect behavioral maturation.