Linked Life Data

8794494

Source:http://linkedlifedata.com/resource/pubmed/id/8794494

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1996-12-5
pubmed:abstractText
A divided visual field presentation of the Stroop colour-word test was used to study interhemispheric (transcallosal) function in schizophrenic and normal subjects. The modified test used a colour strip paired with either an incongruent, neutral or congruent colour word. Interference and facilitation were defined as the difference between the mean reaction times for incongruent stimuli and neutral stimuli and that between neutral stimuli and congruent stimuli, respectively. The stimuli were presented tachistoscopically with the two components either separated across the midline centrally, up or down from the midpoint (bilateral presentation), or presented to a single visual half-field (unilateral presentation). The inclusion of the 'up' and 'down' bilateral conditions controlled for the reaction time advantage for central compared with unilateral stimulus presentations noted in an earlier study (David, 1993a). The difference in reaction time to an incongruent compared with a congruent colour-word pairing, the Combined Stroop Effect (CSE), was not affected significantly by stimulus presentation position (bilateral vs. unilateral) in either the control or schizophrenic group, unlike in the earlier study of David. For controls, interference was significantly greater than facilitation for both bilaterally- and unilaterally-presented stimuli. Schizophrenics had a significantly smaller interference effect for bilaterally-presented stimuli, indicating reduced interhemispheric interference in this group. For the control group, there was no significant difference between right and left CSEs, interference being significantly greater than facilitation on both visual half-field presentations. For schizophrenics, the CSE for left-presented stimuli was significantly greater than that for right-presented stimuli. In addition, left-field facilitation was significantly greater than right-field. Reduced Stroop facilitation with right-field presentations in schizophrenic subjects may reflect increased vulnerability of colour-naming by word-reading in the left hemisphere-evidence for the non-unitary nature of attentional processes and disintegration of these in schizophrenia.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0920-9964
pubmed:author
pubmed:issnType
Print
pubmed:volume
20
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
57-68
pubmed:dateRevised
2010-9-2
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Stroop interference and facilitation in the cerebral hemispheres in schizophrenia.
pubmed:affiliation
Department of Psychological Medicine, Kings' College Hospital, London, UK.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't