The most foolproof way of testing the true effectiveness of a newly introduced method of psychological therapy is by means of ___________?
Correct answer: D. experimental research
- A. survey research
- B. case study research
- C. correlation
- D. experimental research
Explanation
Experimental research is the strongest method for testing therapy effectiveness because researchers can compare treatment and control conditions while manipulating the treatment. Surveys, case studies, and correlations can describe or associate outcomes but cannot establish effectiveness as confidently.
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