Which of the following is one of the five developmental features distinctive to emerging adulthood?

Socially-defined behaviors considered appropriate for individuals occupying certain positions within a given group defines _____

a) the actor-observer effect. b) deindividuation. c) groupthink. d) social roles.

In a study, people played tug-of-war while blindfolded and were told they were pulling in a group on some trials and that they were pulling alone on other trials. When the people thought they were pulling alone, they

a. pulled harder. b. made less of an effort to pull. c. did not vary the amount of effort they exerted on any of the trials. d. were erratic in the amount of effort exerted on the different trials.