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Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

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Published on: June 25, 2019

Lexical access problems lead to disfluencies in speech.

Robert J Hartsuiker¹, Lies Notebaert

¹Department of Experimental Psychology, Ghent University, Belgium. Robert.Hartsuiker@ugent.be

Experimental Psychology

|February 25, 2010

Summary

Speech disfluencies like pauses and self-corrections indicate language production difficulties. Findings show that lower picture name agreement and less frequent determiners increase these speech errors, suggesting distinct production stages.

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Area of Science:

Psycholinguistics
Speech Production
Cognitive Science

Background:

Speech disfluencies are common in everyday speech.
Their underlying cognitive mechanisms are not fully understood.
Lexical access and grammatical encoding are key stages in language production.

Purpose of the Study:

To investigate the relationship between lexical access difficulties and speech disfluencies.
To determine if different types of disfluencies (pauses, repetitions, self-corrections) are associated with specific language production challenges.
To examine the role of determiner frequency in speech production.

Main Methods:

A picture naming experiment was conducted with Dutch speakers.
Participants described networks of line drawings.
Picture name agreement and determiner frequency (common vs. neuter gender) were manipulated.

Main Results:

More pauses and self-corrections occurred under low picture name agreement compared to high agreement.
Repetitions were not affected by picture name agreement.
More self-corrections and repetitions were observed when using the less frequent neuter-gender determiner ('het') versus the common-gender determiner ('de').

Conclusions:

Difficulties in lexical access contribute to specific types of speech disfluencies.
Distinct stages of language production may lead to different patterns of disfluencies.
Linguistic factors like determiner frequency can influence speech fluency.