Posed emotional expression in brain -damaged patients across three channels of communication.
Item
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Title
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Posed emotional expression in brain -damaged patients across three channels of communication.
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Identifier
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AAI3024769
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identifier
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3024769
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Creator
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Canino, Elizabeth.
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Contributor
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Chairperson: Joan C. Borod
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Date
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2001
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Language
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English
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Publisher
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City University of New York.
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Subject
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Psychology, Cognitive
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Abstract
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The ability to pose eight different emotional expressions across three channels of communication (i.e., facial, prosodic/intonational, and lexical/verbal) was examined in individuals with unilateral stroke and in neurologically-healthy cults. This study also determined whether there is a general or separate processors for emotional expression in multiple channels. Also of interest was replicating preliminary findings that interrater reliability could be established using previously developed (Canino et al.,1999) training and rating procedures.;Posers included 19 individuals with right-hemisphere brain damage (RBDs), 17 individuals with left-hemisphere brain damage (LBDs), and 18 normal controls (NCs). All groups were demographically matched, and patient groups were matched on lesion site (frontal, temporal, parietal, and/or occipital lobes). Measures of posed emotional expressions from the New York Emotion Battery (Borod, Welkowitz, & Obler, 1992) included facial emotional expressions, prosodically-intoned neutral-content sentences, and generated word lists for three positive and five negative emotions. Expressions were evaluated for category accuracy, emotional intensity, and rater confidence by a separate set of four raters for each channel. Overall, interrater reliability was high: median complete agreement for accuracy = 73%, and median intraclass correlation for intensity = .85.;Group comparisons for the rating parameters revealed Group-by-Channel interactions, such that prosodic emotional expressions of RBDs and LBDs, relative to those of NCs, were produced with significantly less accuracy and tended to be rated with less confidence. There were no group differences for intensity. Across posers, there were differences for channel (lexical > facial > prosodic) and valence (positive more accurate and more confident, and negative more intense). Exploratory analyses considered demographic variables, nonemotional control tasks, background affect in neutral poses, intrahemispheric lesion location, and language impairments. When correlations were computed among the three channels for each rating parameter, facial and prosodic expression were significantly related to each other but not to lexical expression. Further, when correlations were computed among the three rating parameters for each channel, a similar pattern occurred for face and prosody (i.e., significant correlations between intensity and confidence) as compared to the lexical channel (i.e., significant correlations among all parameters). These findings suggest a dissociation between nonverbal and verbal components of emotional processing.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
