THE ROLE OF HEMISPHERIC SPECIALIZATION IN THE PERCEPTION AND PRODUCTION OF FACIAL AFFECT (LATERALITY).
Item
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Title
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THE ROLE OF HEMISPHERIC SPECIALIZATION IN THE PERCEPTION AND PRODUCTION OF FACIAL AFFECT (LATERALITY).
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Identifier
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AAI8601709
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identifier
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8601709
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Creator
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ZEIDLER, DENISE KAREN.
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Contributor
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Jeffrey J. Rosen
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Date
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1985
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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, Psychobiology
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Abstract
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The hemispheric specialization literature suggests that the perception of faces, of emotional facial expressions and the production of facial expressions are processes which are preferentially dependent on right hemispheric mechanisms. A series of experiments were conducted in order to explore asymmetries associated with these processes with a particular interest in the effect of emotional salience on perceptual asymmetries and the relationship of perceptual and expressive asymmetries within the individual.;Thirteen right-handed subjects posed happy, sad and neutral expressions. Normal orientation and mirror-reversed prints were cut down the midline and like-sided halves joined to create left and right composite photographs. These composites served as stimuli in an intensity rating task and in two tachistoscopic tasks. Thirty-two additional subjects plus nine of the 13 posers participated in three tasks. One task involved rating the emotional intensity of the composite photographs. Measures of "expressive asymmetry" for the 13 posers were derived from the ratings elicited by the left and right composites. In the facial recognition task pairs of faces were successively presented and subjects were required to respond manually if the faces were the same. A similar procedure was used for expression recognition but the discrimination was made on the expression displayed by the face rather than for the identity of the face.;The results were as follows: Left-face effects, presumably reflecting right hemispheric mechanisms, were obtained for sad and neutral expressions under some procedures. Methodological and theoretical issues that may have affected asymmetries were discussed. In the facial recognition an overall LVF effect was found but this effect was not consistent across stimulus faces. In the expression recognition task an overall LVF effect was found with the magnitude of the effect greatest for neutral expressions. Emotional salience did not effect asymmetries in either perceptual task. The results were discussed in terms of how stimulus characteristics may have affected relative hemispheric superiorities. A subset of subjects showed a positive relationship in the direction and degree of asymmetry for the two perceptual tasks while a subset of subjects showed contrasting patterns. However there was no relationship between direction or degree of expressive and perceptual asymmetry.
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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.
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Program
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Psychology
