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Error Variability and the Differentiation Between Apraxia of Speech and Aphasia With Phonemic Paraphasia.

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Title: Error Variability and the Differentiation Between Apraxia of Speech and Aphasia With Phonemic Paraphasia.
Authors: Haley, Katarina L.1 Katarina_Haley@med.unc.edu, Jacks, Adam1, Cunninghama, Kevin T.1, Kreiman, Jody, Liss, Julie
Source: Journal of Speech, Language & Hearing Research. Jun2013, Vol. 56 Issue 3, p891-905. 15p. 8 Charts, 1 Graph.
Subject Terms: *Aphasia, *Computer software, *Statistical correlation, *Speech evaluation, *Speech disorders, *Data analysis, Analysis of covariance, Analysis of variance, Speech apraxia, Research funding, Statistics, Descriptive statistics
Abstract: Purpose: This study was conducted to evaluate the clinical utility of error variability for differentiating between apraxia of speech (AOS) and aphasia with phonemic paraphasia.Method: Participants were 32 individuals with aphasia after left cerebral injury. Diagnostic groups were formed on the basis of operationalized measures of recognized articulatory and prosodic characteristics of AOS and phonemic paraphasia. Sequential repetitions of multisyllabic words were elicited as part of a motor speech evaluation and transcribedphonetically. Four metrics of variability at the syllable and word levels were derived from these transcripts. Results: The measures yielded different magnitudes of variability. There were no group differences between participants who displayed speech profiles consistent with AOS and participants who displayed speech profiles indicative of aphasia with phonemic paraphasia. Rather, correlation coefficients and analyses of covariance showed that the variability metrics were significantly mediated by overall error rate. Additionally, variability scores for individuals with salient diagnoses of AOS and conduction aphasia were inconsistent with current diagnostic guidelines. Conclusions: The results do not support diagnostic validity of error variability for differentiating between AOS and aphasia with phonemic paraphasia. Future research using error variability metrics should account for overall error rate in the analysis and matching of participant groups. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
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  Data: Error Variability and the Differentiation Between Apraxia of Speech and Aphasia With Phonemic Paraphasia.
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  Data: <searchLink fieldCode="AR" term="%22Haley%2C+Katarina+L%2E%22">Haley, Katarina L.</searchLink><relatesTo>1</relatesTo><i> Katarina_Haley@med.unc.edu</i><br /><searchLink fieldCode="AR" term="%22Jacks%2C+Adam%22">Jacks, Adam</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Cunninghama%2C+Kevin+T%2E%22">Cunninghama, Kevin T.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kreiman%2C+Jody%22">Kreiman, Jody</searchLink><br /><searchLink fieldCode="AR" term="%22Liss%2C+Julie%22">Liss, Julie</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Speech%2C+Language+%26+Hearing+Research%22">Journal of Speech, Language & Hearing Research</searchLink>. Jun2013, Vol. 56 Issue 3, p891-905. 15p. 8 Charts, 1 Graph.
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  Data: *<searchLink fieldCode="DE" term="%22Aphasia%22">Aphasia</searchLink><br />*<searchLink fieldCode="DE" term="%22Computer+software%22">Computer software</searchLink><br />*<searchLink fieldCode="DE" term="%22Statistical+correlation%22">Statistical correlation</searchLink><br />*<searchLink fieldCode="DE" term="%22Speech+evaluation%22">Speech evaluation</searchLink><br />*<searchLink fieldCode="DE" term="%22Speech+disorders%22">Speech disorders</searchLink><br />*<searchLink fieldCode="DE" term="%22Data+analysis%22">Data analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Analysis+of+covariance%22">Analysis of covariance</searchLink><br /><searchLink fieldCode="DE" term="%22Analysis+of+variance%22">Analysis of variance</searchLink><br /><searchLink fieldCode="DE" term="%22Speech+apraxia%22">Speech apraxia</searchLink><br /><searchLink fieldCode="DE" term="%22Research+funding%22">Research funding</searchLink><br /><searchLink fieldCode="DE" term="%22Statistics%22">Statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Descriptive+statistics%22">Descriptive statistics</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Purpose: This study was conducted to evaluate the clinical utility of error variability for differentiating between apraxia of speech (AOS) and aphasia with phonemic paraphasia.Method: Participants were 32 individuals with aphasia after left cerebral injury. Diagnostic groups were formed on the basis of operationalized measures of recognized articulatory and prosodic characteristics of AOS and phonemic paraphasia. Sequential repetitions of multisyllabic words were elicited as part of a motor speech evaluation and transcribedphonetically. Four metrics of variability at the syllable and word levels were derived from these transcripts. Results: The measures yielded different magnitudes of variability. There were no group differences between participants who displayed speech profiles consistent with AOS and participants who displayed speech profiles indicative of aphasia with phonemic paraphasia. Rather, correlation coefficients and analyses of covariance showed that the variability metrics were significantly mediated by overall error rate. Additionally, variability scores for individuals with salient diagnoses of AOS and conduction aphasia were inconsistent with current diagnostic guidelines. Conclusions: The results do not support diagnostic validity of error variability for differentiating between AOS and aphasia with phonemic paraphasia. Future research using error variability metrics should account for overall error rate in the analysis and matching of participant groups. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1044/1092-4388(2012/12-0161)
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      – TitleFull: Error Variability and the Differentiation Between Apraxia of Speech and Aphasia With Phonemic Paraphasia.
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              Text: Jun2013
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