A score that is extremely high or extremely low compared with most other scores in a dataset is called a(n):
a. mean
b. outlier
c. skewed distribution
d. variance
Ans: B
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A researcher conditions rats to fear a tone that was sounded just prior to a brief shock. To measure fear following this conditioning, she records the number of lever presses by each rat in the presence and in the absence of the tone. It was hypothesized that reduced lever pressing in the presence of the tone was evidence for a conditioned fear response in rats. If the researcher tested this hypothesis at a .05 level of significance (two-tailed test), then what is her decision if she computes t = –2.842 in a sample of eight rats.
A. Retain the null hypothesis; there is evidence for a conditioned fear response. B. Retain the null hypothesis; there is no evidence for a conditioned fear response. C. Reject the null hypothesis; there is evidence for a conditioned fear response. D. Reject the null hypothesis; there is no evidence for a conditioned fear response.
Techniques for remembering names do not include
a. ?recite the name right after an introduction. b. ?limit the number of new names you learn at one time. c. arrive late to the event so that you have an excuse for not learning names.? d. ?focus your attention upon hearing the name.
A key word in essay tests that asks you to show differences is
a. ?compare. b. ?contrast. c. ?summarize. d. ?relate.
Which of the following goals is least likely to be effectively achieved using portfolio assessments?
A. communication with parents B. demonstration of progress in achievement C. student self-reflection concerning performance D. the assessment of factual knowledge