What is a person experiencing if he perceives stimuli that aren't there?

Name: What is a person experiencing if he perceives stimuli that aren't there?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The person is experiencing hallucinations, which involve perceiving stimuli that aren't actually there. Obsessions involve repetitive and intrusive thoughts or impulses, delusions involve a strongly held false belief, and illusions involve misinterpreting stimuli that are actually present.

What Is a Person Experiencing If He Perceives Stimuli That