RDE: Chapter 10 Interactive Exercises
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1. A simple experiment must involve random assignment.
-- Choose an answer --
a. True
b. False
2. A simple experiment must be done in a lab.
-- Choose an answer --
a. True
b. False
3. An experiment done in a lab will have more internal validity than an experiment done in the field.
-- Choose an answer --
a. True
b. False
4. An experiment done in the lab will tend to have more power than an experiment done in the field.
-- Choose an answer --
a. True
b. False
5. An experiment done in the lab will tend to have more external validity than an experiment done in the field.
-- Choose an answer --
a. True
b. False
6. A lab experiment will tend to be less affected by random error than an experiment done in the field.
-- Choose an answer --
a. True
b. False
7. Gender differences can be studied in a simple experiment.
-- Choose an answer --
a. True
b. False
8. In a properly controlled experiment, all of the control group participants would have the same scores on the dependent variable.
-- Choose an answer --
a. True
b. False
9. Leslie is examining the effects of caffeine on alertness. Leslie tests the control group at 7:00 a.m. and the experimental group at 7:00 p.m. Leslie´s study is a valid simple experiment.
-- Choose an answer --
a. True
b. False
10. If the control group scores are 3, 4, 5 and the experimental group scores are also 3, 4, and 5, the value of t is zero.
-- Choose an answer --
a. True
b. False
11. If you have a two-group simple experiment and the dependent variable is order in which participants finished a task (first, second, third, etc.), you should use a t test to analyze the data.
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a. True
b. False
12. Null results confirm the null hypothesis.
-- Choose an answer --
a. True
b. False
13. Your dependent measure is how many seconds early or late that students arrive to class. For example, students showing up 60 seconds early would get a score of -60, whereas students showing up one minute late would get a score of +60. The distribution is not normally distributed. Instead, it tends to be "J" shaped. That is, whereas the average arrival time might be a minute before class, some people show up much earlier, but very few show up much later. If you have enough participants, you can legitimately do a t test on your data.
-- Choose an answer --
a. True
b. False
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