By definition, those who are intrinsically motivated don't need very much extrinsic motivation.

Extrinsic motivation comes from outside of the individual.

The effect of extrinsic motivation on user behavior in a collaborative information finding system.

Some of those students were provided tangible rewards (e.g. money) as an extrinsic motivation and were observed by researchers to see how they reacted.

Ultimately, social environments seem to have a profound effect on both intrinsic and extrinsic motivation and self-regulation.

Social psychological research has indicated that extrinsic rewards can lead to overjustification and a subsequent reduction in intrinsic motivation.

The organization including the employees, managers, suppliers, customers, and other entities, will receive intrinsic and extrinsic rewards.

In addition, extrinsic rewards may also be given.

Laboratory studies in the 1970s indicated that individuals under conditions with extrinsic rewards showed diminished intrinsic motivation.

In the first two experiments he looked at the effect of extrinsic rewards in terms of a decrease in intrinsic motivation to perform a task.