Non-motor symptoms among persons with Parkinson's Disease (pwPD) such as behavior problems e.g. psychotic symptoms, cognitive and emotion perception deficits affect individual's quality of life. Presence of psychotic symptoms in pwPD herald much worse cognitive disturbances and associated emotion perception deficits to identify their social environment. This study examined the nature of cognitive and emotion perception deficits in pwPD with and without psychosis using electrophysiological and neuropsychological methods.