Is semantic verbal fluency impairment explained by executive function deficits in schizophrenia?
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Publication Date: | 2016 |
Other Authors: | , , , , , , , , |
Format: | Article |
Language: | eng |
Source: | Brazilian Journal of Psychiatry (São Paulo. 1999. Online) |
Download full: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-44462016000200121 |
Summary: | Objective: To investigate if verbal fluency impairment in schizophrenia reflects executive function deficits or results from degraded semantic store or inefficient search and retrieval strategies. Method: Two groups were compared: 141 individuals with schizophrenia and 119 healthy age and education-matched controls. Both groups performed semantic and phonetic verbal fluency tasks. Performance was evaluated using three scores, based on 1) number of words generated; 2) number of clustered/related words; and 3) switching score. A fourth performance score based on the number of clusters was also measured. Results: SZ individuals produced fewer words than controls. After controlling for the total number of words produced, a difference was observed between the groups in the number of cluster-related words generated in the semantic task. In both groups, the number of words generated in the semantic task was higher than that generated in the phonemic task, although a significant group vs. fluency type interaction showed that subjects with schizophrenia had disproportionate semantic fluency impairment. Working memory was positively associated with increased production of words within clusters and inversely correlated with switching. Conclusion: Semantic fluency impairment may be attributed to an inability (resulting from reduced cognitive control) to distinguish target signal from competing noise and to maintain cues for production of memory probes. |
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Is semantic verbal fluency impairment explained by executive function deficits in schizophrenia?Psychosisschizophreniacognitive neurosciencechronic psychiatric illnesslanguage Objective: To investigate if verbal fluency impairment in schizophrenia reflects executive function deficits or results from degraded semantic store or inefficient search and retrieval strategies. Method: Two groups were compared: 141 individuals with schizophrenia and 119 healthy age and education-matched controls. Both groups performed semantic and phonetic verbal fluency tasks. Performance was evaluated using three scores, based on 1) number of words generated; 2) number of clustered/related words; and 3) switching score. A fourth performance score based on the number of clusters was also measured. Results: SZ individuals produced fewer words than controls. After controlling for the total number of words produced, a difference was observed between the groups in the number of cluster-related words generated in the semantic task. In both groups, the number of words generated in the semantic task was higher than that generated in the phonemic task, although a significant group vs. fluency type interaction showed that subjects with schizophrenia had disproportionate semantic fluency impairment. Working memory was positively associated with increased production of words within clusters and inversely correlated with switching. Conclusion: Semantic fluency impairment may be attributed to an inability (resulting from reduced cognitive control) to distinguish target signal from competing noise and to maintain cues for production of memory probes.Associação Brasileira de Psiquiatria2016-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-44462016000200121Brazilian Journal of Psychiatry v.38 n.2 2016reponame:Brazilian Journal of Psychiatry (São Paulo. 1999. Online)instname:Associação Brasileira de Psiquiatria (ABP)instacron:ABP10.1590/1516-4446-2015-1663info:eu-repo/semantics/openAccessBerberian,Arthur A.Moraes,Giovanna V.Gadelha,AryBrietzke,ElisaFonseca,Ana O.Scarpato,Bruno S.Vicente,Marcella O.Seabra,Alessandra G.Bressan,Rodrigo A.Lacerda,Acioly L.eng2016-06-09T00:00:00Zoai:scielo:S1516-44462016000200121Revistahttp://www.bjp.org.br/ahead_of_print.asphttps://old.scielo.br/oai/scielo-oai.php||rbp@abpbrasil.org.br1809-452X1516-4446opendoar:2016-06-09T00:00Brazilian Journal of Psychiatry (São Paulo. 1999. Online) - Associação Brasileira de Psiquiatria (ABP)false |
dc.title.none.fl_str_mv |
Is semantic verbal fluency impairment explained by executive function deficits in schizophrenia? |
title |
Is semantic verbal fluency impairment explained by executive function deficits in schizophrenia? |
spellingShingle |
Is semantic verbal fluency impairment explained by executive function deficits in schizophrenia? Berberian,Arthur A. Psychosis schizophrenia cognitive neuroscience chronic psychiatric illness language |
title_short |
Is semantic verbal fluency impairment explained by executive function deficits in schizophrenia? |
title_full |
Is semantic verbal fluency impairment explained by executive function deficits in schizophrenia? |
title_fullStr |
Is semantic verbal fluency impairment explained by executive function deficits in schizophrenia? |
title_full_unstemmed |
Is semantic verbal fluency impairment explained by executive function deficits in schizophrenia? |
title_sort |
Is semantic verbal fluency impairment explained by executive function deficits in schizophrenia? |
author |
Berberian,Arthur A. |
author_facet |
Berberian,Arthur A. Moraes,Giovanna V. Gadelha,Ary Brietzke,Elisa Fonseca,Ana O. Scarpato,Bruno S. Vicente,Marcella O. Seabra,Alessandra G. Bressan,Rodrigo A. Lacerda,Acioly L. |
author_role |
author |
author2 |
Moraes,Giovanna V. Gadelha,Ary Brietzke,Elisa Fonseca,Ana O. Scarpato,Bruno S. Vicente,Marcella O. Seabra,Alessandra G. Bressan,Rodrigo A. Lacerda,Acioly L. |
author2_role |
author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Berberian,Arthur A. Moraes,Giovanna V. Gadelha,Ary Brietzke,Elisa Fonseca,Ana O. Scarpato,Bruno S. Vicente,Marcella O. Seabra,Alessandra G. Bressan,Rodrigo A. Lacerda,Acioly L. |
dc.subject.por.fl_str_mv |
Psychosis schizophrenia cognitive neuroscience chronic psychiatric illness language |
topic |
Psychosis schizophrenia cognitive neuroscience chronic psychiatric illness language |
description |
Objective: To investigate if verbal fluency impairment in schizophrenia reflects executive function deficits or results from degraded semantic store or inefficient search and retrieval strategies. Method: Two groups were compared: 141 individuals with schizophrenia and 119 healthy age and education-matched controls. Both groups performed semantic and phonetic verbal fluency tasks. Performance was evaluated using three scores, based on 1) number of words generated; 2) number of clustered/related words; and 3) switching score. A fourth performance score based on the number of clusters was also measured. Results: SZ individuals produced fewer words than controls. After controlling for the total number of words produced, a difference was observed between the groups in the number of cluster-related words generated in the semantic task. In both groups, the number of words generated in the semantic task was higher than that generated in the phonemic task, although a significant group vs. fluency type interaction showed that subjects with schizophrenia had disproportionate semantic fluency impairment. Working memory was positively associated with increased production of words within clusters and inversely correlated with switching. Conclusion: Semantic fluency impairment may be attributed to an inability (resulting from reduced cognitive control) to distinguish target signal from competing noise and to maintain cues for production of memory probes. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-44462016000200121 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-44462016000200121 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1516-4446-2015-1663 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Psiquiatria |
publisher.none.fl_str_mv |
Associação Brasileira de Psiquiatria |
dc.source.none.fl_str_mv |
Brazilian Journal of Psychiatry v.38 n.2 2016 reponame:Brazilian Journal of Psychiatry (São Paulo. 1999. Online) instname:Associação Brasileira de Psiquiatria (ABP) instacron:ABP |
instname_str |
Associação Brasileira de Psiquiatria (ABP) |
instacron_str |
ABP |
institution |
ABP |
reponame_str |
Brazilian Journal of Psychiatry (São Paulo. 1999. Online) |
collection |
Brazilian Journal of Psychiatry (São Paulo. 1999. Online) |
repository.name.fl_str_mv |
Brazilian Journal of Psychiatry (São Paulo. 1999. Online) - Associação Brasileira de Psiquiatria (ABP) |
repository.mail.fl_str_mv |
||rbp@abpbrasil.org.br |
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1754212557295452160 |