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Effect of schooling in auditory lexical decision

Efeito da escolaridade em tarefas de decisão lexical auditiva

Abstract

The task of lexical decision demands the functioning of the phonological loop to identify and discriminate strings of sounds and lexical knowledge to identify if this string can be taken as a real word or pseudo-word.

Objective:

To verify the effect of schooling on the performance of healthy elderly in lexical decision tasks, in the auditory modality.

Methods:

23 Participants, aged sixty years or older were divided into two groups: 1-8 years and greater than 8 years of schooling. The PALPA lexical decision subtest containing words and pseudo-words was applied.

Results:

There was no significant difference between the groups in identifying words and pseudo-words. Errors in pseudo-words predominated in both groups. Total scoring of the groups differed with worse performance in the group with less schooling. There was a tendency toward statistically significant difference. The errors in words occurred predominantly in words of low-imageability, especially in the lower educated group. In this group, there was a positive correlation between schooling and errors in pseudo-words.

Conclusion:

There was a mild effect of schooling in this task. Studies on lexical decision with larger samples could offer an important contribution for estimating pre-morbid skills and contribute to understanding pathological conditions.

Key words:
lexical decision; cognition; schooling; aged; language

Resumo

A tarefa de decisão lexical demanda o funcionamento da alça fonológica para identificação e discriminação de seqüências de sons e o conhecimento lexical, para identificar se essa seqüência é ou não uma palavra da língua.

Objetivo:

Verificar o efeito da escolaridade no desempenho de idosos sadios em tarefa de decisão lexical na modalidade auditiva.

Métodos:

Participaram deste estudo 23 idosos, com idade igual ou acima de 60 anos divididos em dois grupos segundo a escolaridade (1-8 anos e acima de 8 anos). Foi aplicado o sub-teste de decisão lexical da bateria PALPA, contendo palavras e pseudopalavras.

Resultados:

Não houve diferenças significativas entre os grupos, na identificação de palavras e pseudo-palavras. Predominaram nos dois grupos, erros em não-palavras. A pontuação total (decisão lexical) dos grupos diferiu, com pior desempenho do grupo menos escolarizado. Houve tendência à expressão estatística, nessa diferença. Os raros erros em palavras ocorreram predominantemente em itens de baixa imageabilidade, especialmente no grupo menos escolarizado. Nesse grupo, houve correlação positiva entre escolaridade e erros em pseudo-palavras.

Conclusão:

Houve discreto efeito de escolaridade, na amostra estudada. Estudos sobre decisão lexical com amostras expandidas, podem proporcionar importante contribuição para a estimativa de habilidades pré-mórbidas e contribuir para o entendimento de condições patológicas.

Palavras-chave:
decisão lexical; cognição; escolaridade; idosos; linguagem

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Publication Dates

  • Publication in this collection
    Apr-Jun 2008

History

  • Received
    20 Mar 2008
  • Accepted
    16 May 2008
Academia Brasileira de Neurologia, Departamento de Neurologia Cognitiva e Envelhecimento R. Vergueiro, 1353 sl.1404 - Ed. Top Towers Offices, Torre Norte, São Paulo, SP, Brazil, CEP 04101-000, Tel.: +55 11 5084-9463 | +55 11 5083-3876 - São Paulo - SP - Brazil
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