Right visual field deficits in reaction time after invalid cues in chronic and never-medicated schizophrenics compared to normal controls

Attentional cues in chronic schizophrenia: Abnormal disengagement of attention.

“…Posner et al interpreted this finding as indicating a left hemisphere deficit in schizophrenia, similar to that demonstrated by patients with left parietal lesions, who have difficulty disengaging from an ipsilateral (left visual field) invalid cue and responding to a right visual field (left hemisphere) target. A similar pattern of results was obtained in chronic and never-medicated schizophrenics, which was also interpreted as a left hemisphere abnormality in schizophrenia (Potkin, Swanson, Urbanchek, Carreon, & Bravo, 1989).…”