Over-justification Effect

The Diderot Effect states that obtaining a new possession often creates a spiral of consumption that leads to additional purchases. Applied to habits, the Diderot Effect reveals their interconnectedness:

• Fixing your diet may inspire you to exercise more
...

The Benjamin Franklin effect has generally been explained using the cognitive dissonance theory.

Essentially, this means that when someone does you a favor, they need to be able to justify it to themself, in order to avoid the cognitive dissonance that might occur from doi...

Rewards usually offer a short-term boost. But the effect wears off, and the negative consequence of them remain: they reduce a person’s longer-term motivation to continue the project.

When money is used as an external reward for some activity, the subjects lose intrins...