Pupillary responses index overload of working memory resources in schizophrenia.
J Abnorm Psychol
; 106(3): 458-67, 1997 Aug.
Article
em En
| MEDLINE
| ID: mdl-9241947
ABSTRACT
The authors examined the hypothesis that schizophrenia patients have reduced availability of working memory resources by using pupillary responses as an index of resource overload. Pupillary responses were recorded during a verbal working memory task (digit recall) in 24 schizophrenia patients and 32 normal controls. Pupil size increased with increased processing load (digit-span length) but changed little or declined when processing demands exceeded available resources (overload). The schizophrenia patients showed impaired digit recall and abnormally small pupillary responses during digit presentation only in the higher processing load conditions, but they showed abnormally small pupillary responses during digit retrieval in all processing load conditions. The results suggest reduced availability of slave store and central executive working memory resources in schizophrenia. This study serves as an example of how pupillography methods can be used to test current hypotheses regarding overload of cognitive capacities in schizophrenia patients.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Esquizofrenia
/
Psicologia do Esquizofrênico
/
Pupila
/
Memória
Limite:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Abnorm Psychol
Ano de publicação:
1997
Tipo de documento:
Article
País de afiliação:
Estados Unidos