The overjustification effect is a term in psychology that is described as an act when used diminishes intrinsic motivation; this effect takes place when a reward (introduction of an extrinsic reward ) is been attached as a motivator of behavior, as a result, decreases the intrinsic motivation (behavior that is driven by internal rewards) to do something. Incentive such as money, gift, praise etc are introduced after a behavior can lead to lower, rather than higher motivation to perform a task
According to the overjustification effect, reinforcements that praise people tend to increase intrinsic motivation, and reinforcement that seeks to control people decrease intrinsic motivation.
