Kazuhiko Iwata

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BACKGROUND In Japan, Job assistance for SMI have been not active. Compared with mental retardation, employment rate of SMI was low. The needs of the effective job assistance for SMI are growing. The purpose of this study was to determine the effectiveness of the combination approach of Cognitive Remediation (CR) and Supported Employment (SE) in clinical(More)
We conducted a noninvasive near-infrared spectroscopy (NIRS) study using the game of rock, paper, scissors (RPS) as a simple neurocognitive task for the prefrontal cortex (PFC) in 15 healthy volunteers. We employed an opposite "to lose" RPS task coupled with a normal "to win" RPS task, since the former requires inhibition of behavior, one of the most(More)
AIM The present study aimed to test the construct validity and internal consistency of the Social Cognition Screening Questionnaire (SCSQ) (Japanese version). METHODS We first tested whether the subscale scores and the total score of the SCSQ could discriminate patients with schizophrenia from normal controls. Next, we tested the internal consistency.(More)
Epidemiological studies have consistently shown that autism spectrum disorders (ASDs) affect more males than females. However, it has been debated whether this male predominance might be, at least in part, derived from under-diagnosis of this disorder in females. Rivet and Matson (2011) have reported that females with ASD have experienced misdiagnosis,(More)
AIMS Facial emotion perception is considered to provide a measure of social cognition. Numerous studies have examined the perception of emotion in patients with schizophrenia, and the majority has reported impaired ability to recognize facial emotion perception. We aimed to investigate the correlation between facial expression recognition and other domains(More)
We report several cases in which patients with autistic disorder with mental retardation who received risperidone experienced urinary incontinence. We retrospectively investigated the medical records of patients housed in facilities for patients with autistic disorder with mental retardation. Those who had undergone a medical examination at a hospital in(More)
AIM Methods to improve neurocognitive impairments are of important research interest. This study sought to examine the synergistic effects of neurocognitive rehabilitation and antipsychotics for schizophrenia. METHODS Subjects were 43 patients diagnosed with schizophrenia or schizoaffective disorder in a randomized trial of the effects of neurocognitive(More)