Abstract:
:Schizophrenia (SZ) occurs among a spectrum of disorders with similar characteristics, including schizotypal personality disorder (SPD). Visual processing disturbances have been reported in both disorders, but it is not yet clear which processes are disturbed in both SZ and SPD, suggestive of a common endophenotype, and which appear only in SZ. In order to address this question, the authors evaluated visual event-related potentials (ERPs) elicited during a line-orientation discrimination task in control, SPD, and SZ participants. Visual ERPs allow specification of both the time course and physiological correlates of visual perception and cognition. SZ patients had smaller P100 and P300a amplitudes and prolonged P300b latency compared to the control group. SZ patients also had smaller N160, N200, P300a, and P300b amplitudes compared to the SPD group. SPD participants did not differ from control participants on any ERP measure. These data documented pervasive abnormalities in visual perception and attention in SZ but not in SPD, suggesting that these visual ERP disturbances may not represent a common endophenotype.
journal_name
J Abnorm Psycholjournal_title
Journal of abnormal psychologyauthors
Vohs JL,Hetrick WP,Kieffaber PD,Bodkins M,Bismark A,Shekhar A,O'Donnell BFdoi
10.1037/0021-843X.117.1.119subject
Has Abstractpub_date
2008-02-01 00:00:00pages
119-31issue
1eissn
0021-843Xissn
1939-1846pii
2008-01363-009journal_volume
117pub_type
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