Chapter 3 Interactive Exercises
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1. Are moderator variables more closely associated with internal, external, or construct validity?
-- Choose an answer --
a. Construct
b. External
c. Internal
2. According to astrologers, the major mediating variable in astrology would most likely be
-- Choose an answer --
a. A person´s water sign
b. The precise moment of birth
c. Gravitational pull of celestial bodies at the moment of birth
3. People work harder when they are alone than when they are in groups. In addition, the bigger the group, the less work they tend to do. Research focusing on quantifying the extent to which increasing group size decreases effort is probably examining
-- Choose an answer --
a. Functional relationships
b. Mediating variables
c. Moderating variables
4. Research focusing on finding exceptions to the rule that increases in group size result in less effort is probably focusing on
-- Choose an answer --
a. Functional relationships
b. Mediating variables
c. Moderating variables
5. Research focusing on the thought processes that are responsible for increases in group size resulting in less effort is probably focusing on
-- Choose an answer --
a. Functional relationships
b. Mediating variables
c. Moderating variables
6. If , based on a double-blind experiment, a researcher concludes that there is no difference between the effectiveness of generic and brand name drugs, the conclusion should be questioned because
-- Choose an answer --
a. Double-blind studies can produce misleading results
b. Experiments are not effective tools for making cause-effect statements
c. The null hypothesis cannot be proven
7. The results of a research study could, in principle, lead to accepting which of the following hypotheses.
-- Choose an answer --
a. There is no difference between the effectiveness of behavioral and cognitive therapies.
b. Watching television decreases happiness.
c. Nutrasweet¨ has no side effects.
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