Which of the following behavioral problems would suggest an organic brain lesion :
Visual hallucinations
Formal thought disorder
Auditory hallucinations
Depression
While the majority of hallucinations reported in primary psychotic disorders are auditory, they may also be visual, olfactory, tactile, or gustatory.
Visual hallucinations have been reported in 16% – 72% of patients with schizophrenia and schizoaffective disorder.