17. In an experiment, the dependent variable is a. held constant b. manipulated

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Question

17. In an experiment, the dependent variable is

a. held constant

b. manipulated by the researcher

c. allowed to vary randomly

d. measured

18. In a ________ design, participants are randomly assigned to one of two or more groups.

a. pretest-posttest

b. repeated measures

c. matched-participants

d. randomized groups

19. Which of the following is an advantage of matched-subjects designs over randomized groups designs?

a. fewer participants are needed

b. the experimental groups are more likely to be similar

c. they are easier to conduct

d. pretest sensitization is less likely

20. Which of the following is an advantage of repeated measures over randomized groups designs?

a. order effects are possible

b. the experimental groups are likely to be more random

c. fewer participants are needed

d. fewer experimental conditions are used

21. A researcher who asks people to answer questions on questionnaires is using a (an) ________ measure.

a. observational

b. self-report

c. ratio

d. affective

17. (d) , the independent variable is allowed to vary and the value of the dependent variable is measured.

18. (d) , by definition of a randomized block design.

19. (c) , since they are used to differentiate between two modes of treatment.

20. (b) , self explanatory.

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