Reactive devaluation refers to the tendency for individuals to devalue or reject an idea or proposal simply because it has been presented by a person or group that they disagree with or dislike. This phenomenon is often driven by the desire to protect one's own beliefs and values, as well as a desire to maintain a positive self-image.

One example of reactive devaluation is when an individual rejects a political candidate simply because they are affiliated with a particular party or ideology that the individual disagrees with, rather than considering the candidate's qualifications or policies. Similarly, an individual may reject a proposal or idea simply because it was presented by a person or group that they dislike, rather than evaluating the merit of the proposal itself.

Reactive devaluation can occur in a variety of settings, including political debates, business negotiations, and even in personal relationships. It can be a barrier to effective communication and collaboration, as individuals may be less open to considering alternative viewpoints or ideas.

To overcome reactive devaluation, it is important for individuals to be aware of their tendency to reject ideas or proposals simply because they come from a person or group that they disagree with or dislike. By actively seeking out and considering alternative viewpoints and being open to the possibility that one's own beliefs may be wrong, individuals can reduce the influence of reactive devaluation and improve their ability to make informed decisions.