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Differences in the Perception of Emotion in Chimeric Faces between Left-and Right-Handed Individuals
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sapanski, Linda Petry, Susan |
| Copyright Year | 2006 |
| Abstract | When judging emotional facial expression, most right-handed individuals focus on the information in their left visual field, the perceived left side of the face. This left-field advantage is consistent with neurological findings of right-hemisphere superiority in processing emotions. Here we extend this finding to left-handed individuals to determine the extent of left-hemisphere emotional processing in this population. In order to create a more life-like setting than past research, photographs were used instead of cartoons; moreover, emotional quality was expanded. Fifty-five participants (30 right-handed, 25 left-handed) were given the Edinburgh [Handedness] Inventory to measure strength of handedness preference. Twelve stimuli were created as “chimeric” faces in which the left side of the face expressed one emotion and the right side expressed a different emotion. The chimeric faces were the following: Happy/Angry, Angry/Happy, Happy/Fear, Fear/Happy, Fear/Angry, and Angry/Fear. Each face was depicted by a male and female model, for a total of 12 chimeric faces. Participants viewed all twelve stimuli in random order. Each stimulus was preceded by a fixation point and presented for 200 milliseconds. These conditions minimized the possibility of eye movements, thus ensuring that each hemisphere “saw” a different emotion. For each stimulus, participants were asked to rate the strength and valence of the emotion they saw and to label the emotion as Happy, Anger, Fear(ful), or Sad. It was hypothesized that left-handed persons would perceive the emotion on the right side of the visual field more often than that on the left, revealing a reverse effect of hemispherical processing for left-handed individuals. Main effects were found for both handedness and emotional quality. Left-handed participants reported perceiving the emotional quality projected to the left visual cortex (right visual field) significantly more than right-handed participants. In addition, happiness was perceived significantly more often than any other emotion, independent of its location. These findings support the hypothesis. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.ncur20.com/presentations/8/804/paper.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
