The likelihood that a person will help someone else in trouble ________ as the number of bystanders present increases

The observation that sometimes subjects are extremely willing to complete a meaningless task in order to help the experimenter illustrates the idea of

a. the experimenter expectancy effect. b. the subject selection bias. c. the good subject effect. d. the Hawthorne effect.

Business deals are often win-win propositions; both parties to the deal can end up benefiting. Social psychologists would describe such deals as ____

a. zero-sum games b. non-zero-sum games c. commons dilemmas d. equity games