Positive Symptoms	Negative Symptoms
Hallucinations Delusions Positive formal thought disorder Repeated instances of bizarre or disorganized behaviour All first rank (Schneiderian) florid symptoms: Audible thoughts (thought echo) Voices heard arguing, or commenting on one’s actions Somatic/thought passivity experiences (delusions of control) Thought withdrawal Thought broadcasting (also called thought diffusion) Thought insertion (Thoughts are ascribed to other people who intrude their thoughts upon the patient) Delusional perception and association (i.e., taking a normal sensory perception to mean a bizarre situation, such as taking seeing an aeroplane as indicating the patient should be the next president)	Flattening of affects Anhedonia (inability to experience pleasure) Alogia (poverty of speech) Asociality (reduced motivation to engage in social interaction and/or the preference for solitary activities) Avolition-Apathy (general lack of drive, or motivation to pursue meaningful goals; impassivity, perfunctoriness, a state of indifference) Anergia (lethargy, physical inactivity) Loss of sexual interest and libido Slowed body movements
	Cognitive Deterioration
	Attentional impairment Memory impairment Deterioration of executive function