A teacher expects that her student will be shy so she doesn’t speak much to him


A teacher expects that her student will be shy, so she doesn’t speak much to him. Because she doesn’t speak to him, he doesn’t talk much. When people behave in ways that make a prediction come true, it is called:

a. Self-fulfilling prophecy.

b. Observer bias.

c. Single-blind experiment.

d. Naturalistic observation.

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A _________ is a small group that accurately reflects a larger population by including the same proportion of men, women, young, old, professionals, blue-collar workers, Republicans, Democrats, whites, African Americans, Native Americans, Latinos, Asians, and so on as found in the population as a whole.

a. Correlational group.

b. Control group.

c. Representative sample.

d. Balance-bias sample.

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In an experiment to find out whether taking vitamins increases IQ scores, the IQ scores would be:

a. The independent variable.

b. A control variable.

c. An extraneous variable.

d. The dependent variable.

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For the numbers 10, 19, 2, 9, and 15, the range is:

a. 17.

b. 11.

c. 15.

d. 10.

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A statistical technique called ___________ can be used to combine the results of many studies, as if they were all part of one large study.

a. Meta-analysis

b. The natural clinical test.

c. The standard error of measurement.

d. Double-blind experimental analysis.

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A way to increase the credibility of results of an experimental study is to

a. Replicate the study.

b. Use random assignment when assigning participants to groups.

c. Use double-blind methods when dispensing treatment.

d. All of the above.

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An educated guess about the likely outcome of an experiment is the:

a. Research question.

b. Dependent variable.

c. Hypothesis.

d. Theory.

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When an experimenter unwittingly influences research participants so that they behave in ways consistent with the experimenter’s hypothesis, ___________ has occurred.

a. Researcher bias.

b. The placebo effect.

c. Anthropomorphic bias.

d. The extraneous effect.

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The Reeds have five children aged 2, 6, 9, 11, and 14. The median age of the Reed children is:

a. 3.

b. 9.

c. 6.

d. 7.

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An advantage of the correlational method is that:

a. It can determine cause and effect.

b. It goes in depth to understanding one or a few people.

c. It can establish that relationships exist between variables that may be difficult to study in a lab.

d. It allows for the study of rare events.