Delusional perception is a Schneider First-Rank Symptom where a normal perception is given a private, idiosyncratic, and delusional meaning without any logical or understandable link. In this case, the normal perception of a traffic light turning green is given a delusional meaning related to a government message. A delusion of reference is a belief that certain gestures, comments, environmental cues, and so forth are directed at oneself, but it doesn't necessarily involve a normal perception being given a *new* delusional meaning. Thought broadcasting is the belief that one's thoughts are escaping one's mind. Auditory hallucination involves hearing sounds in the absence of an external stimulus.
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