A researcher is studying the amount of sleep college students get each night. She notices that there is a lot of variability in the data, with some students typically sleeping for around 8 hours a night and some sleeping around 5 hours a night
One way to measure how spread out the data scores are is to use:
a. the arithmetic mean.
b. meta-analysis.
c. inferential statistics.
d. the standard deviation.
Answer: d
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Axelrod’s tit for tat (TFT) strategy is effective because it immediately ___ against individuals who compete and immediately ___ with individuals who cooperate.
a. reciprocates; retaliates b. forgives; provokes c. retaliates; reciprocates d. provokes; retaliates
Animations that grafted emotion-conveying faces onto toy trains have been developed to alleviate symptoms of
A) stranger anxiety. B) MMR vaccinations. C) infantile amnesia. D) autism
Arthur is not a very conscientious individual. He often sleeps late in the morning, and on mornings when he oversleeps, he usually just skips work. He has already been fired from four different jobs, but he is not concerned because he feels that there are lots of other jobs available. In this example, Arthur's lack of dedication to his various jobs would most likely be considered:
a. emotionally disturbing and psychologically abnormal b. emotionally disturbing but psychologically normal c. dysfunctional but psychologically normal d. dysfunctional and psychologically abnormal
Memories emerge most efficiently when the context of retrieval matches the context of encoding. This is known as
a. the levels-of-processing effect. b. encoding specificity. c. the serial position effect. d. contextual distinctiveness.