Internal and external validity in two studies that compared treatment methods.

  • Jeffrey A Gliner
  • Published 1989 in
    The American journal of occupational therapy…

Abstract

Research comparing the effectiveness of two treatments offers both strengths and weaknesses for occupational therapy. Although it is worthwhile to determine which of two treatments works best for a particular problem, methodological problems may arise that preclude a valid conclusion. To draw valid conclusions from research, criteria for internal validity… (More)

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