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Hemispheric differences in the perception of positive and negative faces.
The International Journal of Neuroscience
|August 1, 1985
Summary
Emotional stimuli perception impacts choice reaction time. Positive facial expressions were identified faster than negative ones in the right visual field, suggesting visual field influences emotional processing speed.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Emotion Research
Background:
- Investigating the influence of emotional stimuli on cognitive processes like reaction time.
- Understanding how the visual system processes emotional facial expressions.
Purpose of the Study:
- To examine the effect of positive and negative emotional stimuli on choice reaction time.
- To determine if visual field presentation affects emotional perception and reaction speed.
Main Methods:
- Thirty-two healthy right-handed adults (15 males, 17 females) participated.
- Slides of faces displaying positive (happy, surprise) or negative (anger, disgust, sadness) emotions were presented.
- Stimuli were shown in either the right or left visual field using a tachistoscope.
Main Results:
- A main effect for visual field was observed, with slightly faster responses to stimuli in the right visual field.
- A significant interaction between affect and visual field was found.
- Positive facial stimuli were identified more quickly than negative stimuli when presented to the right visual field.
Conclusions:
- Visual field significantly influences choice reaction time, particularly for emotional stimuli.
- The perception of positive emotional stimuli is facilitated in the right visual field compared to negative stimuli.