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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 comprehension. Target sentence is namja-ka uyu-lul mas-ess-ta ‘the man drank milk’.
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Figure 2: A sample trial for comprehension. Target sentence is namja-ka uyu-lul mas-ess-ta ‘the man drank milk’.

Mentions: A picture to spoken sentence matching task was used to examine comprehension of the past, simple present, and future forms. No temporal adverbs were used in the sentence stimuli, unlike the production task. The participant was presented with a pair of pictures (Figure 2) and asked to point to the picture that matched the sentence produced by the examiner. The sentence was repeated once when requested by the participant. No time limit was given in the participant’s response. For self-corrected trials, the final response was scored.


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 comprehension. Target sentence is namja-ka uyu-lul mas-ess-ta ‘the man drank milk’.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 2: A sample trial for comprehension. Target sentence is namja-ka uyu-lul mas-ess-ta ‘the man drank milk’.
Mentions: A picture to spoken sentence matching task was used to examine comprehension of the past, simple present, and future forms. No temporal adverbs were used in the sentence stimuli, unlike the production task. The participant was presented with a pair of pictures (Figure 2) and asked to point to the picture that matched the sentence produced by the examiner. The sentence was repeated once when requested by the participant. No time limit was given in the participant’s response. For self-corrected trials, the final response was scored.

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