When it comes to social dilemmas,
a. an individual who adopts a cooperative strategy will always be more profitable than one who is selfish.
b. the most beneficial course of action for an individual will, if chosen by most people, be harmful to all in the long run.
c. one side always has to win, and one side always has to lose.
d. laboratory studies cannot be useful in understanding the escalation and persistence of group conflicts.
Answer: B
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Two-year-old Luis does a great imitation of a train engineer. Luis plays for hours with his toy train set. Luis's train sounds are so realistic that sometimes his parents think that there is a real train going by their house
According to Piaget, Luis's ability to use a toy train set to represent a real train illustrates that he is capable of a. operation. c. symbolic function. b. scheme. d. concept.
When a child reacts to an object's real size, rather than to the size of the retinal image, then ____ is evident
a. stereopsis b. intermodal perception c. the visual cliff d. size constancy