The overjustification effect: A meta-analysis

We found support for the effect across age, dependent measure, and design type in specific situations where it is predicted to occur

Shu-Hua Tang; Vernon C. Hall

2007

Scholarcy highlights

  • This article reports the results of a meta-analysis using 50 experimental studies of the overjustification effect
  • Findings are less supportive of the theory for situations where there should be no difference between experimental and control groups

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