Thought Suppression

Thought suppression is a form of motivated forgetting in which a person consciously attempts to stop themselves from thinking about a particular thought, functioning as a psychological defense mechanism that is also closely associated with obsessive-compulsive disorder, where a person may repeatedly try to prevent an intrusive thought from recurring. The psychologist Daniel Wegner pioneered empirical research into thought suppression during the 1980s and developed the theoretical account explaining its counterintuitive effects. In Wegner's foundational demonstration, participants were asked to avoid thinking about a specific target, such as a white bear, for five minutes, ringing a bell whenever the thought occurred anyway; when participants were later told to think about the target freely, those who had earlier tried to suppress the thought reported a higher frequency of the target thought than participants who had not been asked to suppress it, an outcome termed the rebound effect. Wegner developed ironic process theory to explain this pattern, proposing that the deliberate effort to suppress a thought paradoxically increases how frequent and accessible that thought becomes, particularly when a person is also under cognitive load, so that the very act of trying to suppress an unwanted thought can end up strengthening its prominence rather than reducing it.