In the United States, almost ________ of teenagers will become pregnant before they are 18 years old

The concept of ________ emphasizes that changes in cognitive activity patterns might result in disuse and consequent atrophy of cognitive skills.

terminal decline "use it or lose it" multiple intelligence "mind over matter"

Social psychologists often make use of a game called the ____ to study people's tendencies to cooperate versus compete

a. commons dilemma b. prisoner's dilemma c. matching game d. naïve bystander circle