Communicative gestures in aphasia |
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Authors: | Guila Glosser Morton Wiener Edith Kaplan |
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Affiliation: | 1. Center for Informatics and Systems of University of Coimbra, Coimbra, Portugal;2. Carnegie Mellon University, Pittsburgh, PA 15213, USA;1. Institute for Software Research, Carnegie Mellon University, Pittsburgh, PA 15213, USA;2. Department of Informatics Engineering, University of Coimbra, Portugal;3. School of Computing, University of Kent, UK;4. CISUC, University of Coimbra, Portugal;5. Critical Software, Portugal |
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Abstract: | Gestural communications of 10 mild and moderate aphasics and five controls were examined in two conditions: Face-to-face informal dyadic conversation and restricted visual access between speaker and listener. Gestural production was significantly reduced with restriction of visual access, supporting the posited communicative function of the hand and arm gestures investigated in this study. No differences were found between aphasic and control subjects in the rate of gestural communication in the natural condition of face-to-face interaction. Moderate aphasics, however, were found to produce proportionally fewer of the complex semantic modifying and relational communicative gestures and more nonspecific, nonconsensually shared, unclear gestures. Gestural complexity was significantly negatively correlated with measures of linguistic impairment for the aphasics. The relationship between the frequency and complexity of communicative gestures and concurrent verbalizations was also examined. The findings of this study provide confirmation for the view that there is an identifiable class of gestures utilized by aphasics for communication, aphasics are impaired in their gestural communicative competence in natural conditions of communication, and the quality of aphasics' gestural communications parallels changes in their verbal communication patterns. |
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