Undermining children's intrinsic interest with extrinsic reward: A test of the "overjustification" hypothesis.

@article{Lepper1973UnderminingCI,
  title={Undermining children's intrinsic interest with extrinsic reward: A test of the "overjustification" hypothesis.},
  author={Mark R. Lepper and David Greene and Richard E. Nisbett},
  journal={Journal of Personality and Social Psychology},
  year={1973},
  volume={28},
  pages={129-137}
}
A field experiment was conducted with children to test the "overjustification" hypothesis suggested by self-percepti on theory—the proposition that a person's intrinsic interest in an activity may be decreased by inducing him to engage in that activity as an explicit means to some extrinsic goal. Children showing intrinsic interest in a target activity during base-line observations were exposed to one of three conditions: In the expected-award condition, subjects agreed to engage in the target… 

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