Hunting-Pompon R.,University of Washington |
Kendall D.,University of Washington |
Kendall D.,Medical Center Puget Sound |
Moore A.B.,and D Center for Aging Veterans with Vision Loss |
Moore A.B.,Emory University
Aphasiology | Year: 2011
Background: People who report mild anomia following stroke often score near or within normal limits on traditional assessments of language. Based on evidence of cognitive influences on linguistic production in people with aphasia, this study examined non-linguistic, cognitive function and its potential influence on word retrieval in individuals with mild anomia. Aims: This study explored the following research questions: Do people with mild anomia have impaired performance on tasks which require (a) automatic vs controlled processing and/or (b) selective attention relative to neurologically typical controls? Methods & Procedures: A total of 14 participants with mild anomia and 9 neurologically typical controls were tested using Covert Orienting of Visuospatial Attention Test (COVAT), alone and with linguistic interference, at two interstimulus intervals (ISI) representing automatic and controlled processing. Outcomes & Results: Participants with anomia showed significantly slower responses on COVAT alone at 100 ms ISI (automatic processing) compared with controls. The groups did not differ significantly during COVAT alone at 800 ms ISI (controlled processing). Additionally, similar priming patterns were exhibited by both groups on COVAT alone during both interstimulus intervals, indicating an intact validity effect. However, participants with anomia demonstrated significantly delayed response times during the COVAT with linguistic interference, regardless of ISI. Conclusions: Overall, participants with mild anomia demonstrated impairments most notably when interfering stimuli were present, indicating deficits in automatic processing and selective attention. Study results support clinical evaluation of non-linguistic cognitive abilities in individuals reporting anomia who score near or within normal limits on language assessments. © 2011 Psychology Press.
del Toro C.M.,University of Florida |
Bislick L.P.,University of Washington |
Comer M.,University of Florida |
Velozo C.,University of Florida |
And 8 more authors.
Journal of Speech, Language, and Hearing Research | Year: 2011
Purpose: The purpose of this study was to develop a short form of the Boston Naming Test (BNT; Kaplan, Goodglass, & Weintraub, 2001) for individuals with aphasia and compare it with 2 existing short forms originally analyzed with responses from people with dementia and neurologically healthy adults. Method: Development of the new BNT-Aphasia Short Form and analysis of the other 2 forms were completed with archival data from 100 individuals with aphasia. The authors developed the BNT-Aphasia Short Form using items from the original 60-item instrument based on item response theory. Rasch analysis was computed on the short forms developed by Graves, Bezeau, Fogarty, and Blair (2004) and by Mack, Freed, Williams, and Henderson (1992). Results: Analysis of the Graves et al. (2004) short form resulted in the smallest range of item difficulty and the largest floor effect compared with the Mack et al. (1992) short form and the BNT-Aphasia short form. The BNT-Aphasia Short Form showed an increase in information in the middle of the scale relative to both the Graves et al. and the Mack et al. forms. Conclusions: The new short form demonstrates good psychometric properties when used with individuals with aphasia. However, the Mack et al. form proved to be as psychometrically sound as the BNT-Aphasia Short Form and is also appropriate for individuals with aphasia. © American Speech-Language-Hearing Association.