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MMLU / An evaluation of a particular treatment fails to show an overall effect.…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

An evaluation of a particular treatment fails to show an overall effect. However, the experimenter does find thar the most severely disturbed do show considerable improvement, and therefore concludes that the treatment is effective with extreme cases. This conclusion

choices

  1. is valid if t test comparing severely disturbed patients with less severely disturbed patients is significant
  2. fails to take into account regression toward the mean
  3. fails to take into account historical and maturational variables
  4. fails to take into account the fact thar the “placebo effect” is most pronounced in severely disturbed patients

subject

professional_psychology

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Source and history

Official source

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