Cook (1970) placed prejudiced participants in a game in which black and white participants ran a simulated railroad. The tasks demanded close cooperation among the participants, and during the breaks, the black participant (an experimental confederate) led conversation about both race-related and personal topics. What percent of the previously established prejudiced participants became less prejudiced?

Describe a standard test that a developmentalist might use to determine whether an infant has attained object permanence. Why might the test not work? Use your answer to explain why some of Piaget's findings have been challenged by other researchers

What will be an ideal response?

Research suggests that mammals—such as dogs, cats, and primates—are the only animals which demonstrate consistent personalities

Indicate whether this statement is true or false.