Psychiatric disorders are characterized by a range of specific cognitive distortions. One of the most interesting cognitive phenomena is Thought-Shape Fusion, which occurs when thinking about eating certain types of food increases a person’s estimate of their shape and/or weight, elicits a perception of moral wrongdoing, and/or makes the person feel fat. TSF can be induced experimentally in healthy volunteers, but it is especially associated with eating pathology. It may be that thought–shape fusion is both a direct expression of the core psychopathology and also serves to maintain it. In patients for whom thought–shape fusion appears to be a barrier to changing the core psychopathology, direct techniques for addressing thought–shape fusion may be very useful.
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