Pathological deficits including poverty of speech, blunted and flat affect, loss of volition, and social withdrawal are which symptoms of schizophrenia ?

Negative symptoms of schizophrenia

The symptoms of schizophrenia can be grouped into three categories, viz. positive symptoms (i.e. excesses of thought, emotion, and behaviour), negative symptoms (i.e. deficits of thought, emotion, and behaviour), and psychomotor symptoms.

Negative symptoms are ‘pathological deficits’ and include poverty of speech, blunted and flat affect, loss of volition, and social withdrawal.