Test Yourself
Take this quiz and see how you do. Select the correct answers by using the drop down menus. Once you are done, click submit to see your score! The ones that you get wrong will have a check!
1. Internal validity is important if you are to establish that a training program is effective.
-- Choose an answer --
a. True
b. False
2. By carefully choosing your two groups, you can eliminate extraneous variables.
-- Choose an answer --
a. True
b. False
3. Arbitrary assignment to group eliminates selection bias.
-- Choose an answer --
a. True
b. False
4. Matching participants on pretest scores eliminates selection bias.
-- Choose an answer --
a. True
b. False
5. In a two-group (treatment group versus no-treatment group) study, the biggest threat to internal validity is
-- Choose an answer --
a. Maturation
b. Selection
6. Some 40% shooters may score 50% on a free throw shooting test.
-- Choose an answer --
a. True
b. False
7. Pretest scores are perfect predictors of posttest scores.
-- Choose an answer --
a. True
b. False
8. Groups that are the same on the pretest variable will be the same on all other relevant variables.
-- Choose an answer --
a. True
b. False
9. Selection-maturation interactions can occur because scores are affected by random error.
-- Choose an answer --
a. True
b. False
10. If two groups score the same on the pretest, they may score differently on the posttest even if neither is given a treatment.
-- Choose an answer --
a. True
b. False
11. Selection by maturation may occur because matched groups may differ from each other in terms of unmatched variables.
-- Choose an answer --
a. True
b. False
12. Which of the following is a more serious threat to the internal validity of a two-group design?
-- Choose an answer --
a. Maturation
b. Mortality
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