Abstract
In a study using a trial by trial version of the Stroop color naming task, we previously found that unmedicated patients with schizophrenia show a pattern of abnormal performance characterized by increased facilitation (speeding) of color-naming, color-congruent words but normal amounts of interference (slowing) of color-naming, color-incongruent words (Carter et al., 1992). Since a similar finding had recently been reported in patients with Parkinson's disease, we suggested that this findings was consistent with hypotheses about the neurobiological substrates of cognitive impairment that draw upon parallel patterns of cognitive performance in the two illnesses. We now report results from an enlarged group of unmedicated patients with schizophrenia that extend our original finding by allowing us to evaluate the role of illness subtype in abnormal performance on the Stroop task. We found that patients with the undifferentiated subtype of the disorder account for the increased Stroop facilitation effect. Patients with the paranoid subtype show their own pattern of abnormal performance, with normal amounts of facilitation and increased interference. These findings are consistent with the results of other studies which suggest that illness subtype is an important source of variability in studies of cognitive functioning in schizophrenia.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 17-26 |
| Number of pages | 10 |
| Journal | Psychiatry Research |
| Volume | 48 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1993 |
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Keywords
- attention
- cognition
- diagnostic subtypes
- paranoid schizophrenia
- Stroop task
- undifferentiated schizophrenia
ASJC Scopus subject areas
- Psychiatry and Mental health
- Biological Psychiatry
- Psychology(all)
Cite this
Abnormal processing of irrelevant information in schizophrenia : The role of illness subtype. / Carter, Cameron S; Robertson, Lynn C.; Nordahl, Thomas E; O'Shora-Celaya, Linda J.; Chaderjian, Marc R.
In: Psychiatry Research, Vol. 48, No. 1, 1993, p. 17-26.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Abnormal processing of irrelevant information in schizophrenia
T2 - The role of illness subtype
AU - Carter, Cameron S
AU - Robertson, Lynn C.
AU - Nordahl, Thomas E
AU - O'Shora-Celaya, Linda J.
AU - Chaderjian, Marc R.
PY - 1993
Y1 - 1993
N2 - In a study using a trial by trial version of the Stroop color naming task, we previously found that unmedicated patients with schizophrenia show a pattern of abnormal performance characterized by increased facilitation (speeding) of color-naming, color-congruent words but normal amounts of interference (slowing) of color-naming, color-incongruent words (Carter et al., 1992). Since a similar finding had recently been reported in patients with Parkinson's disease, we suggested that this findings was consistent with hypotheses about the neurobiological substrates of cognitive impairment that draw upon parallel patterns of cognitive performance in the two illnesses. We now report results from an enlarged group of unmedicated patients with schizophrenia that extend our original finding by allowing us to evaluate the role of illness subtype in abnormal performance on the Stroop task. We found that patients with the undifferentiated subtype of the disorder account for the increased Stroop facilitation effect. Patients with the paranoid subtype show their own pattern of abnormal performance, with normal amounts of facilitation and increased interference. These findings are consistent with the results of other studies which suggest that illness subtype is an important source of variability in studies of cognitive functioning in schizophrenia.
AB - In a study using a trial by trial version of the Stroop color naming task, we previously found that unmedicated patients with schizophrenia show a pattern of abnormal performance characterized by increased facilitation (speeding) of color-naming, color-congruent words but normal amounts of interference (slowing) of color-naming, color-incongruent words (Carter et al., 1992). Since a similar finding had recently been reported in patients with Parkinson's disease, we suggested that this findings was consistent with hypotheses about the neurobiological substrates of cognitive impairment that draw upon parallel patterns of cognitive performance in the two illnesses. We now report results from an enlarged group of unmedicated patients with schizophrenia that extend our original finding by allowing us to evaluate the role of illness subtype in abnormal performance on the Stroop task. We found that patients with the undifferentiated subtype of the disorder account for the increased Stroop facilitation effect. Patients with the paranoid subtype show their own pattern of abnormal performance, with normal amounts of facilitation and increased interference. These findings are consistent with the results of other studies which suggest that illness subtype is an important source of variability in studies of cognitive functioning in schizophrenia.
KW - attention
KW - cognition
KW - diagnostic subtypes
KW - paranoid schizophrenia
KW - Stroop task
KW - undifferentiated schizophrenia
UR - http://www.scopus.com/inward/record.url?scp=0027234418&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0027234418&partnerID=8YFLogxK
U2 - 10.1016/0165-1781(93)90109-T
DO - 10.1016/0165-1781(93)90109-T
M3 - Article
C2 - 8416015
AN - SCOPUS:0027234418
VL - 48
SP - 17
EP - 26
JO - Psychiatry Research
JF - Psychiatry Research
SN - 0165-1781
IS - 1
ER -