The double-blind control procedure is difficult to conduct in research that is purely psychological in nature primarily because

A) it is difficult to create experimentally adequate and believable placebo manipulations.
B) it is difficult to train assistants to be blind to participant assignment.
C) it is difficult to obtain participants for these designs.
D) these procedures typically take longer to conduct than other procedures.


Answer: A

Political Science

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Skocpol (1979) noted that a crucial ingredient for successful revolution is a state in crisis--often one that has been weakened by international events. Discuss one revolution in which this applies and how.

What will be an ideal response?

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The Three-Fifths Compromise stipulated that ______.

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Even in the 1930s, public opinion polls showed

A. that as many as half the voters were skeptical of a federal unemployment compensation program. B. that over 90 percent of Americans were supportive of Social Security. C. that most Americans were against the national highway system being built at the time. D. that most Americans wanted an activist foreign policy. E. None of these are correct.

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