Behavioural deficits, such as flattened emotions and social withdrawal

Faulty beliefs that cannot be shaken despite evidence to the contrary

Abnormal motor activity, ranging from rigidity to excitement

Behavioural excesses or peculiarities, such as hallucinations and delusions

A break from the real world

Perceived sensations with the absence of real, external stimuli

Disrupted flow of thought, rapid topic changes, or speech lacking meaning