It's generally held that extrinsic rewards reinforce intrinsic rewards in a positive direction when the individual can attribute the source of the extrinsic reward to her own efforts.

Question

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When individuals can attribute the source of extrinsic rewards to their own efforts, it reinforces their intrinsic motivation positively. This is known as the "overjustification effect." However, if extrinsic rewards are perceived as controlling or undermining intrinsic motivation, the effect may be negative.

It's Generally Held That Extrinsic Rewards Reinforce Intrinsic Rewards in a Positive