Because Ken's history professor was a college student during the 1970s, he has extraordinary insight and knowledge of facts concerning the Vietnam War era. This knowledge is associated with the term

, a business-owner, sought the help of a friend to find out which employees were likely to be loyal and honest if hired. The friend examined the bumps on the heads of all applicants and gave Sam a list of the employees he should hire. Sam's friend is a

a. sociologist b. alchemist c. psychiatrist d. phrenologist

Biological maturation underlies language development in much the same way that it underlies physical and motor development. This phrase underscores __________

a) the interactionist position of language development. b) the cognitive perspective on language development. c) the learning perspective on language development. d) the nativist position on language development.