PMID- 9783347
OWN - NLM
STAT- MEDLINE
DCOM- 19981230
LR  - 20190915
IS  - 0920-9964 (Print)
IS  - 0920-9964 (Linking)
VI  - 33
IP  - 1-2
DP  - 1998 Sep 7
TI  - Backward masking in schizophrenia: time course of visual processing deficits 
      during task performance.
PG  - 79-86
AB  - Backward masking deficits have been put forward as potential psychological 
      markers for vulnerability to schizophrenia. This study was conducted to 
      investigate whether schizophrenic patients improve their performance on a 
      backward masking task during a single test session. The ability of a degraded 
      stimulus version of the masking task to act as a specific diagnostic marker for 
      paranoid schizophrenia (versus affective disorder) was also investigated. The 
      backward masking task was performed on 18 paranoid schizophrenic patients, 18 
      unipolar depressed patients, and 18 non-psychiatric controls. Paranoid 
      schizophrenic patients were included because they tend to show normal performance 
      with traditional masking protocols. Schizophrenic patients made significantly 
      more detection errors compared to depressives and non-psychiatric controls where 
      interstimulus intervals (ISIs) longer than 14 ms were used. Unlike depressed 
      patients and non-psychiatric controls, schizophrenic patients showed no reduction 
      in error rate during the entire period over which the backward masking task was 
      performed. The constant error rate which was observed at an ISI of 114 ms 
      suggests that schizophrenic patients cannot attenuate the disruption effect due 
      to deflection of attention from the target to the mask. The backward masking 
      deficit in schizophrenia appears to arise from a temporarily stable visual 
      processing impairment in performance within a single test session.
FAU - Suslow, T
AU  - Suslow T
AD  - Department of Psychiatry, Westphalian Wilhelms-University, Munster, Germany.
FAU - Arolt, V
AU  - Arolt V
LA  - eng
PT  - Journal Article
PL  - Netherlands
TA  - Schizophr Res
JT  - Schizophrenia research
JID - 8804207
SB  - IM
MH  - Adult
MH  - Female
MH  - Humans
MH  - Male
MH  - Neuropsychological Tests
MH  - Perceptual Disorders/*diagnosis
MH  - *Perceptual Masking
MH  - Schizophrenia/*chemically induced
MH  - Schizophrenic Psychology
MH  - Time Factors
MH  - Visual Perception/*physiology
EDAT- 1998/10/23 00:00
MHDA- 1998/10/23 00:01
CRDT- 1998/10/23 00:00
PHST- 1998/10/23 00:00 [pubmed]
PHST- 1998/10/23 00:01 [medline]
PHST- 1998/10/23 00:00 [entrez]
AID - S0920-9964(98)00053-X [pii]
AID - 10.1016/s0920-9964(98)00053-x [doi]
PST - ppublish
SO  - Schizophr Res. 1998 Sep 7;33(1-2):79-86. doi: 10.1016/s0920-9964(98)00053-x.