Craig and Sandra's relationship has a distinct sense of mutual reciprocity and a significant affective investment from each child. Their relationship can be defined as a

Psychologist William Sheldon believed he could infer people's personalities based on __________, but well-controlled studies later found only weak or nonexistent correlations.

A. their body types B. the bumps on their heads C. their race and gender D. their facial configuration

Kenny hates working on school projects in groups, because he has noticed that most group members don't try as hard as they would if they were working alone. Kenny has noticed the phenomenon of

A) group think. B) laissez-faire leadership. C) social loafing. D) leadership emergence.