Hallucinations (sensory perception without external stimuli. It involves seeing, hearing, feeling, tasting, and smelling things that are not actually there).
Emotional withdrawal
Lack of touch with reality
Delusions (false beliefs and perceptions. Examples include believing that people are plotting against you and that the radio or television is sending hidden signals)
Disorganized speech
Trouble with thinking
Lack of motivation
Social isolation
Aggression
Agitation
Reduced emotional responsiveness (characterized by a lack of facial expressions, a reduced emotional response than expected in a situation, vocal intonation, and a lack of gestures that typically accompany emotions)
Neglect of personal hygiene
Compulsive behavior, etc.
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