The calculation of the df for the ?2 test of independence is
a. r x c - 1
b. (r-1)(c-1).
c. (r-c)n.
d. r x c.
b
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In one study, students were given two problems to solve. The first problem involved radiation and a tumor, the second involved a general and a fortress. Students rarely saw that the solution to the second problem could be used to solve the first problem because the two problems seemed too different. Being distracted by the superficial features of a problem is the obstacle to problem solving known as ________________.
a. salience of surface similarities b. mental sets c. functional fixedness d. searching for analogies
Fred is 82. He refuses to stop driving because "Giving up my wheels would mean I couldn't take care of myself anymore. I would have to go into a home or depend on my children to take me everywhere." Based on this chapter, Fred's response is:
a) normal, but somewhat dangerous. b) unusual; most older adults give up driving. c) appropriate, as Fred should be completely safe. d) inappropriate; Fred can ask his family for help.