motivation :Problems With Extrinsic Motivation

Extrinsic motivation is encouragement from an outside force; behavior is performed based on the expectance of an outside reward, such as money or praise. Extrinsic rewards can be abused to bribe or coerce someone into doing something that they would not do on their own. Unfortunately, these types of reward systems are often found in classrooms in the form of stars, red-light green-light, or WOWS, to name a few. Ryan and Deci (1996) describe these rewards as task-contingent; the rewards are contingent on the completion of the task. The problems with these types of extrinsic motivators are numerous

by Ryan and Deci