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Production and Comprehension of Time Reference in Korean Nonfluent Aphasia.

Lee J, Kwon M, Na HR, Bastiaanse R, Thompson CK - Commun Sci Disord (2013)

Bottom Line: Sentence priming production and auditory sentence to picture matching tasks were used, parallel with the previous cross-linguistic experiments in English, Chinese, Turkish, and others.In production, they were impaired in all time references with errors being dominated by substitution of incorrect time references and other morpho-phonologically well-formed errors, indicating a largely intact morphological affixation process.In comprehension, they showed selective impairment of the past, consistent with the cross-linguistic evidence from English, Chinese, Turkish, and others.

View Article: PubMed Central - PubMed

Affiliation: Aphasia & Neurolinguistics Research Laboratory, Communication Sciences and Disorders, Northwestern University, Evanston, IL, USA ; Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, IN, USA.

ABSTRACT

Objectives: Individuals with nonfluent agrammatic aphasia show impaired production and comprehension of time reference via verbal morphology. However, cross-linguistic findings to date suggest inconsistent evidence as to whether tense processing in general is impaired or time reference to the past is selectively difficult in this population. This study examined production and comprehension of time reference via verb morphology in Korean-speaking individuals with nonfluent aphasia.

Methods: A group of 9 healthy controls and 8 individuals with nonfluent aphasia (5 for the production task) participated in the study. Sentence priming production and auditory sentence to picture matching tasks were used, parallel with the previous cross-linguistic experiments in English, Chinese, Turkish, and others.

Results: The participants with nonfluent aphasia showed different patterns of impairment in production and comprehension. In production, they were impaired in all time references with errors being dominated by substitution of incorrect time references and other morpho-phonologically well-formed errors, indicating a largely intact morphological affixation process. In comprehension, they showed selective impairment of the past, consistent with the cross-linguistic evidence from English, Chinese, Turkish, and others.

Conclusion: The findings suggest that interpretation of past time reference poses particular difficulty in nonfluent aphasia irrespective of typological characteristics of languages; however, in production, language-specific morpho-semantic functions of verbal morphology may play a significant role in selective breakdowns of time reference.

No MeSH data available.


Related in: MedlinePlus

A sample trial for production. (A) The prime sentence is yeoja-ka ecey keurim-ul keuri-ess-ta ‘yesterday, the woman drew a picture’. (B) The target sentence is yeoja-ka ecey keurim-ul chilha-ss-ta ‘yesterday the woman painted a picture’.
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Figure 1: A sample trial for production. (A) The prime sentence is yeoja-ka ecey keurim-ul keuri-ess-ta ‘yesterday, the woman drew a picture’. (B) The target sentence is yeoja-ka ecey keurim-ul chilha-ss-ta ‘yesterday the woman painted a picture’.

Mentions: A sentence priming production paradigm was used to elicit the target verb forms. For each trial, participants were presented with a pair of pictures. The neutral verb forms (verb stem + plain declarative ending -ta) were provided in writing to minimize confounding effects from verb retrieval deficits of participants with aphasia (Figure 1). The examiner produced a prompt sentence with a targeted verb form. Then, the target sentence was introduced with a lead-in structure and the participant was asked to complete the sentence with a correct verb form. A set of eight practice trials preceded the experimental trials. No feedback regarding the accuracy of the responses was provided during the experimental trials. The examiner repeated the prompt sentence once when requested by the participant. Production of the target verb form was scored as correct. Given that the participant was provided with a targeted verb form, substitution of the present progressive form for the simple present form or vice versa was considered as incorrect. No time limit was given in the participant’s response and the last attempt was scored when the response was self-corrected by the participant. When incorrect responses occurred, error types were tallied into substitution, omission, and ‘other’ errors.


Production and Comprehension of Time Reference in Korean Nonfluent Aphasia.

Lee J, Kwon M, Na HR, Bastiaanse R, Thompson CK - Commun Sci Disord (2013)

A sample trial for production. (A) The prime sentence is yeoja-ka ecey keurim-ul keuri-ess-ta ‘yesterday, the woman drew a picture’. (B) The target sentence is yeoja-ka ecey keurim-ul chilha-ss-ta ‘yesterday the woman painted a picture’.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4539264&req=5

Figure 1: A sample trial for production. (A) The prime sentence is yeoja-ka ecey keurim-ul keuri-ess-ta ‘yesterday, the woman drew a picture’. (B) The target sentence is yeoja-ka ecey keurim-ul chilha-ss-ta ‘yesterday the woman painted a picture’.
Mentions: A sentence priming production paradigm was used to elicit the target verb forms. For each trial, participants were presented with a pair of pictures. The neutral verb forms (verb stem + plain declarative ending -ta) were provided in writing to minimize confounding effects from verb retrieval deficits of participants with aphasia (Figure 1). The examiner produced a prompt sentence with a targeted verb form. Then, the target sentence was introduced with a lead-in structure and the participant was asked to complete the sentence with a correct verb form. A set of eight practice trials preceded the experimental trials. No feedback regarding the accuracy of the responses was provided during the experimental trials. The examiner repeated the prompt sentence once when requested by the participant. Production of the target verb form was scored as correct. Given that the participant was provided with a targeted verb form, substitution of the present progressive form for the simple present form or vice versa was considered as incorrect. No time limit was given in the participant’s response and the last attempt was scored when the response was self-corrected by the participant. When incorrect responses occurred, error types were tallied into substitution, omission, and ‘other’ errors.

Bottom Line: Sentence priming production and auditory sentence to picture matching tasks were used, parallel with the previous cross-linguistic experiments in English, Chinese, Turkish, and others.In production, they were impaired in all time references with errors being dominated by substitution of incorrect time references and other morpho-phonologically well-formed errors, indicating a largely intact morphological affixation process.In comprehension, they showed selective impairment of the past, consistent with the cross-linguistic evidence from English, Chinese, Turkish, and others.

View Article: PubMed Central - PubMed

Affiliation: Aphasia & Neurolinguistics Research Laboratory, Communication Sciences and Disorders, Northwestern University, Evanston, IL, USA ; Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, IN, USA.

ABSTRACT

Objectives: Individuals with nonfluent agrammatic aphasia show impaired production and comprehension of time reference via verbal morphology. However, cross-linguistic findings to date suggest inconsistent evidence as to whether tense processing in general is impaired or time reference to the past is selectively difficult in this population. This study examined production and comprehension of time reference via verb morphology in Korean-speaking individuals with nonfluent aphasia.

Methods: A group of 9 healthy controls and 8 individuals with nonfluent aphasia (5 for the production task) participated in the study. Sentence priming production and auditory sentence to picture matching tasks were used, parallel with the previous cross-linguistic experiments in English, Chinese, Turkish, and others.

Results: The participants with nonfluent aphasia showed different patterns of impairment in production and comprehension. In production, they were impaired in all time references with errors being dominated by substitution of incorrect time references and other morpho-phonologically well-formed errors, indicating a largely intact morphological affixation process. In comprehension, they showed selective impairment of the past, consistent with the cross-linguistic evidence from English, Chinese, Turkish, and others.

Conclusion: The findings suggest that interpretation of past time reference poses particular difficulty in nonfluent aphasia irrespective of typological characteristics of languages; however, in production, language-specific morpho-semantic functions of verbal morphology may play a significant role in selective breakdowns of time reference.

No MeSH data available.


Related in: MedlinePlus