The tendency for some people to fail to make distinctions among other people and to perceive other people as similar to one another is called cognitive __________

A primary reinforcer

A) increases the frequency of responding. B) is always pleasant. C) is determined by the environment. D) is learned, rather than innate.

Sherif's (1966) Robber's Cave State Park study demonstrated that conflict can be created simply by randomly assigning people into competing groups. He later demonstrated that he could reduce conflict by having campers work together to achieve some mutual interest (e.g., fixing a broken truck or restoring the camp's water supply). Sherif's study demonstrates how ________ foster cooperation.

A. perceived differences B. integrative agreements C. non-zero-sum games D. superordinate goals