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Effects of Brain Laterality on Decoding Accuracy for Facial Displays of Emotion
Unformatted Document Text:  Effects of Brain 14 attentive than SD females, who were more open and attentive than SD males. According to Sonnier (1992) the right hemisphere processes information in a more open, trusting, and non- judgmental fashion than the left hemisphere does. Bodary and Miller’s finding is consistent with Sonnier (1992) and the explanation that AD individuals have excessive right brain skills. However, Bodary and Miller also found that AD females reported communication style preferences similar to SD males. The deficit of AD females, in comparison with AD males and SD females, is odd considering that AD females should also excel at primarily right brain activities. Consequently, it appears as though hemispheric dominance interacts with sex to produce effects that dominance alone would not. Again, Iaccino (1993) reported that women are less lateralized and more symmetrical in their brain specialization than men. This would explain why AD males would be similar to SD females. Women are less lateralized than men to begin with, thus it appears logical that the least lateralized men (AD) would be similar to the most lateralized (SD) women. However, it does not seem logical that the AD females, the least lateralized women, would be similar to SD males, the most lateralized men. Bodary and Miller (2000) concluded that, “Individuals with anomalous dominance reported style preferences contrary to traditional sex expectations and more in line with results which might be predicted from psychological gender” (p. 93). It is possible that sex and hemispheric dominance interact differently than previously expected. Given the contradictory nature of much of the literature on the effect of brain dominance, we advance research questions instead of directional predictions: RQ2: Does hemispheric dominance affect the decoding of facial emotion? RQ3: Do hemispheric dominance and sex interact to affect the decoding of facial emotion?

Authors: Floyd, Kory. and Mikkelson, Alan.
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Effects of Brain 14
attentive than SD females, who were more open and attentive than SD males. According to
Sonnier (1992) the right hemisphere processes information in a more open, trusting, and non-
judgmental fashion than the left hemisphere does. Bodary and Miller’s finding is consistent with
Sonnier (1992) and the explanation that AD individuals have excessive right brain skills.
However, Bodary and Miller also found that AD females reported communication style
preferences similar to SD males. The deficit of AD females, in comparison with AD males and
SD females, is odd considering that AD females should also excel at primarily right brain
activities. Consequently, it appears as though hemispheric dominance interacts with sex to
produce effects that dominance alone would not. Again, Iaccino (1993) reported that women are
less lateralized and more symmetrical in their brain specialization than men. This would explain
why AD males would be similar to SD females. Women are less lateralized than men to begin
with, thus it appears logical that the least lateralized men (AD) would be similar to the most
lateralized (SD) women. However, it does not seem logical that the AD females, the least
lateralized women, would be similar to SD males, the most lateralized men. Bodary and Miller
(2000) concluded that, “Individuals with anomalous dominance reported style preferences
contrary to traditional sex expectations and more in line with results which might be predicted
from psychological gender” (p. 93). It is possible that sex and hemispheric dominance interact
differently than previously expected. Given the contradictory nature of much of the literature on
the effect of brain dominance, we advance research questions instead of directional predictions:
RQ2: Does hemispheric dominance affect the decoding of facial emotion?
RQ3: Do hemispheric dominance and sex interact to affect the decoding of facial
emotion?


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