Oddly Wired
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thought

You try to suppress thoughts and make them louder.

The 'ironic process theory' suggests that the effort to suppress a specific thought makes it more cognitively accessible.

When participants were instructed not to think of a white bear, the thought became a preoccupation that returned more frequently than in those who were not told to suppress it.

You cannot fight a thought by trying to banish it.

Where this comes from

Study
Daniel Wegner, 1994
What the check found
The claim correctly identifies the theory and its seminal author. The 1994 paper 'Ironic processes of mental control' in Psychological Review is the foundational text for the formal theory.
Confidence
Well replicated
thoughtcognitionsuppression

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.