If you were conducting survey research, which of these things is more likely than the others to undermine its validity?
a. Researchers purposely avoid discussion of controversial issues with people who are part of a prospective random sample.
b. People who are part of a prospective random sample screen their phone calls.
c. People who are part of a prospective random sample are contacted as close to Election Day as possible.
d. Researchers ask people who are part of a prospective random sample too many open-ended questions.
b
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What is one suggested limitation of the single subject design?
a) significant expense b) internal validity c) external validity d) none of the above
Which of the following does NOT explain why the national security infrastructure remains embedded in American society?
a. Defense industries account for 10 percent of all U.S. manufacturing. b. Defense domestic spending increased at the end of the cold war. c. One in 10 jobs is directly or indirectly dependent on defense spending. d. The Pentagon is the nation's largest purchaser of goods and services.