Approximately what percent of American eighth-graders report using inhalants to get high?

Rough-and-tumble play, the most common form of active play, is found traditionally and almost exclusively among children living in the United States

Indicate whether this statement is true or false.

The definition of "cognition" at the Center for Cognitive Studies was ____.?

a. ?in terms of sign Gestalts b. ?in terms of the stream of consciousness reported by the Einfall technique c. ?whatever introspectors reported d. ?focused on Köhler's insight learning phenomenon e. ?whatever behaviorism was not