Remembering the time you broke your leg is which kind of memory?

Children with certain genetic predispositions often seek out and create their own environments, a phenomenon termed by some developmentalists as

A) diathesis-stress. B) nature via nurture. C) nature versus nurture. D) correlation opposing causation.

Twins Jillian and Wesley, 11 months old, play near each other with similar materials. However, they do not try to direct each other's activities. They are engaged in

A) parallel play. B) cooperative play. C) associative play. D) nonsocial activity.