The question as to whether the experimental treatment was the "sole cause" of the changes in the dependent variable is the basic issue in external validity.
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Verified
Q33: A researcher is conducting an experiment in
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Q35: Which of the following occurs if the
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Q39: Which of the following is a way
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Q42: Which experimental research design involves repeated measures?
A)within-subjects
Q43: A researcher is interested in the level
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