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The Aphasia Communication Outcome Measure (ACOM): Dimensionality, Item Bank Calibration, and Initial Validation

Bibliographic Details
Journal Title: Journal of Speech, Language, and Hearing Research
Authors and Corporations: Hula, William D., Doyle, Patrick J., Stone, Clement A., Austermann Hula, Shannon N., Kellough, Stacey, Wambaugh, Julie L., Ross, Katherine B., Schumacher, James G., St. Jacque, Ann
In: Journal of Speech, Language, and Hearing Research, 58, 2015, 3, p. 906-919
Type of Resource: E-Article
Language: English
published:
American Speech Language Hearing Association
Subjects:
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rft.atitle The Aphasia Communication Outcome Measure (ACOM): Dimensionality, Item Bank Calibration, and Initial Validation
rft.epage 919
rft.genre article
rft.issn 1092-4388
1558-9102
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rft.date 2015-06-01
x.date 2015-06-01T00:00:00Z
rft.spage 906
rft.volume 58
abstract <jats:sec> <jats:title>Purpose</jats:title> <jats:p>The purpose of this study is to investigate the structure and measurement properties of the Aphasia Communication Outcome Measure (ACOM), a patient-reported outcome measure of communicative functioning for persons with aphasia.</jats:p> </jats:sec> <jats:sec> <jats:title>Method</jats:title> <jats:p>Three hundred twenty-nine participants with aphasia responded to 177 items asking about communicative functioning. The data were analyzed using a categorical item factor analysis approach. Validity of ACOM scores on the basis of their convergence with performance-based, clinician-reported, and surrogate-reported assessments of communication was also assessed.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>Fifty-nine items that obtained adequate fit to a modified bifactor measurement model and functioned similarly across several demographic and clinical subgroupings were identified. The factor model estimates were transformed to item response theory graded response model parameters, and the resulting score estimates showed good precision and moderately strong convergence with other measures of communicative ability and functioning. A free software application for administration and scoring of the ACOM item bank is available from the first author.</jats:p> </jats:sec> <jats:sec> <jats:title>Conclusions</jats:title> <jats:p>The ACOM provides reliable measurement of patient-reported communicative functioning in aphasia. The results supported the validity of ACOM scores insofar as (a) factor analyses provided support for a coherent measurement model, (b) items functioned similarly across demographic and clinical subgroups, and (c) scores showed good convergence with measures of related constructs.</jats:p> </jats:sec> <jats:sec> <jats:title>Supplemental Material</jats:title> <jats:p> <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="https://doi.org/10.23641/asha.6170312">https://doi.org/10.23641/asha.6170312</jats:ext-link> </jats:p> </jats:sec>
authors Array ( [rft.aulast] => Hula [rft.aufirst] => William D. )
Array ( [rft.aulast] => Doyle [rft.aufirst] => Patrick J. )
Array ( [rft.aulast] => Stone [rft.aufirst] => Clement A. )
Array ( [rft.aulast] => Austermann Hula [rft.aufirst] => Shannon N. )
Array ( [rft.aulast] => Kellough [rft.aufirst] => Stacey )
Array ( [rft.aulast] => Wambaugh [rft.aufirst] => Julie L. )
Array ( [rft.aulast] => Ross [rft.aufirst] => Katherine B. )
Array ( [rft.aulast] => Schumacher [rft.aufirst] => James G. )
Array ( [rft.aulast] => St. Jacque [rft.aufirst] => Ann )
doi 10.1044/2015_jslhr-l-14-0235
languages eng
url http://dx.doi.org/10.1044/2015_jslhr-l-14-0235
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Linguistics and Language
Language and Linguistics
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author Hula, William D., Doyle, Patrick J., Stone, Clement A., Austermann Hula, Shannon N., Kellough, Stacey, Wambaugh, Julie L., Ross, Katherine B., Schumacher, James G., St. Jacque, Ann
author_facet Hula, William D., Doyle, Patrick J., Stone, Clement A., Austermann Hula, Shannon N., Kellough, Stacey, Wambaugh, Julie L., Ross, Katherine B., Schumacher, James G., St. Jacque, Ann, Hula, William D., Doyle, Patrick J., Stone, Clement A., Austermann Hula, Shannon N., Kellough, Stacey, Wambaugh, Julie L., Ross, Katherine B., Schumacher, James G., St. Jacque, Ann
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container_title Journal of Speech, Language, and Hearing Research
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description <jats:sec> <jats:title>Purpose</jats:title> <jats:p>The purpose of this study is to investigate the structure and measurement properties of the Aphasia Communication Outcome Measure (ACOM), a patient-reported outcome measure of communicative functioning for persons with aphasia.</jats:p> </jats:sec> <jats:sec> <jats:title>Method</jats:title> <jats:p>Three hundred twenty-nine participants with aphasia responded to 177 items asking about communicative functioning. The data were analyzed using a categorical item factor analysis approach. Validity of ACOM scores on the basis of their convergence with performance-based, clinician-reported, and surrogate-reported assessments of communication was also assessed.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>Fifty-nine items that obtained adequate fit to a modified bifactor measurement model and functioned similarly across several demographic and clinical subgroupings were identified. The factor model estimates were transformed to item response theory graded response model parameters, and the resulting score estimates showed good precision and moderately strong convergence with other measures of communicative ability and functioning. A free software application for administration and scoring of the ACOM item bank is available from the first author.</jats:p> </jats:sec> <jats:sec> <jats:title>Conclusions</jats:title> <jats:p>The ACOM provides reliable measurement of patient-reported communicative functioning in aphasia. The results supported the validity of ACOM scores insofar as (a) factor analyses provided support for a coherent measurement model, (b) items functioned similarly across demographic and clinical subgroups, and (c) scores showed good convergence with measures of related constructs.</jats:p> </jats:sec> <jats:sec> <jats:title>Supplemental Material</jats:title> <jats:p> <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="https://doi.org/10.23641/asha.6170312">https://doi.org/10.23641/asha.6170312</jats:ext-link> </jats:p> </jats:sec>
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spelling Hula, William D. Doyle, Patrick J. Stone, Clement A. Austermann Hula, Shannon N. Kellough, Stacey Wambaugh, Julie L. Ross, Katherine B. Schumacher, James G. St. Jacque, Ann 1092-4388 1558-9102 American Speech Language Hearing Association Speech and Hearing Linguistics and Language Language and Linguistics http://dx.doi.org/10.1044/2015_jslhr-l-14-0235 <jats:sec> <jats:title>Purpose</jats:title> <jats:p>The purpose of this study is to investigate the structure and measurement properties of the Aphasia Communication Outcome Measure (ACOM), a patient-reported outcome measure of communicative functioning for persons with aphasia.</jats:p> </jats:sec> <jats:sec> <jats:title>Method</jats:title> <jats:p>Three hundred twenty-nine participants with aphasia responded to 177 items asking about communicative functioning. The data were analyzed using a categorical item factor analysis approach. Validity of ACOM scores on the basis of their convergence with performance-based, clinician-reported, and surrogate-reported assessments of communication was also assessed.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>Fifty-nine items that obtained adequate fit to a modified bifactor measurement model and functioned similarly across several demographic and clinical subgroupings were identified. The factor model estimates were transformed to item response theory graded response model parameters, and the resulting score estimates showed good precision and moderately strong convergence with other measures of communicative ability and functioning. A free software application for administration and scoring of the ACOM item bank is available from the first author.</jats:p> </jats:sec> <jats:sec> <jats:title>Conclusions</jats:title> <jats:p>The ACOM provides reliable measurement of patient-reported communicative functioning in aphasia. The results supported the validity of ACOM scores insofar as (a) factor analyses provided support for a coherent measurement model, (b) items functioned similarly across demographic and clinical subgroups, and (c) scores showed good convergence with measures of related constructs.</jats:p> </jats:sec> <jats:sec> <jats:title>Supplemental Material</jats:title> <jats:p> <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="https://doi.org/10.23641/asha.6170312">https://doi.org/10.23641/asha.6170312</jats:ext-link> </jats:p> </jats:sec> The Aphasia Communication Outcome Measure (ACOM): Dimensionality, Item Bank Calibration, and Initial Validation Journal of Speech, Language, and Hearing Research
spellingShingle Hula, William D., Doyle, Patrick J., Stone, Clement A., Austermann Hula, Shannon N., Kellough, Stacey, Wambaugh, Julie L., Ross, Katherine B., Schumacher, James G., St. Jacque, Ann, Journal of Speech, Language, and Hearing Research, The Aphasia Communication Outcome Measure (ACOM): Dimensionality, Item Bank Calibration, and Initial Validation, Speech and Hearing, Linguistics and Language, Language and Linguistics
title The Aphasia Communication Outcome Measure (ACOM): Dimensionality, Item Bank Calibration, and Initial Validation
title_full The Aphasia Communication Outcome Measure (ACOM): Dimensionality, Item Bank Calibration, and Initial Validation
title_fullStr The Aphasia Communication Outcome Measure (ACOM): Dimensionality, Item Bank Calibration, and Initial Validation
title_full_unstemmed The Aphasia Communication Outcome Measure (ACOM): Dimensionality, Item Bank Calibration, and Initial Validation
title_short The Aphasia Communication Outcome Measure (ACOM): Dimensionality, Item Bank Calibration, and Initial Validation
title_sort the aphasia communication outcome measure (acom): dimensionality, item bank calibration, and initial validation
topic Speech and Hearing, Linguistics and Language, Language and Linguistics
url http://dx.doi.org/10.1044/2015_jslhr-l-14-0235