Mental Health Disorders : Articles
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Imprecise term, primarily used by laypeople, to refer to mental conditions. This term is widely used, but has no precise definition.
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Positive symptoms are thoughts, behaviors, or sensory perceptions present in a person with a mental disorder, but not present in people in the normal population. Examples of positive symptoms are hallucinations (seeing, hearing, or smelling things not really there), delusions (belief in ideas not based on reality), disorganized speech (loose association between ideas, derailment of sentences, incoherence, illogical statements, excessive detail, and rhyming of words), or bizarre behavior.
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Negative symptoms are thoughts, feelings, or behaviors normally present that are absent or diminished in a person with a mental disorder. Examples of negative symptoms are social withdrawal, apathy (decreased motivation), poverty of speech (brief replies), inability to experience pleasure (anhedonia), limited emotional expression, or defects in attention control.
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