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Increased negative emotional responses in PROP supertasters.
Michael Macht1, Jochen Mueller
1Department of Psychology, University of Würzburg, Marcusstr. 9-11, D-97070 Würzburg, Germany. macht@psychologie.uni-wuerzburg.de
Physiology & Behavior
|December 5, 2006
Summary
Increased sensitivity to the bitter compound 6-n-propylthiouracil (PROP) is linked to heightened emotional reactivity in humans, particularly for anger and fear responses. This suggests a connection between taste perception and emotional arousability.
Area of Science:
- Psychology
- Neuroscience
- Sensory Science
Background:
- Animal studies suggest a link between bitter taste sensitivity and emotional reactivity.
- Human studies are needed to confirm this association.
Purpose of the Study:
- To investigate the relationship between sensitivity to 6-n-propylthiouracil (PROP), a bitter compound, and experimentally induced negative emotional responses in humans.
- To determine if PROP taster status influences the intensity of emotional reactions.
Main Methods:
- Participants were classified as PROP non-tasters, medium tasters, or supertasters.
- Negative emotional responses were induced using anger- and sadness-provoking film clips.
- Self-rated emotional responses were measured before and after film viewing.
Main Results:
- PROP supertasters exhibited more intense emotional responses, including anger, tension, sadness, and fear, after viewing an anger-inducing film compared to non-tasters and medium tasters.
- Significant correlations were observed between continuous measures of PROP sensitivity and emotional responses.
- No significant differences in emotional responses were found after viewing a sadness-inducing film clip.
Conclusions:
- Human PROP sensitivity is associated with emotional arousability, particularly for emotions like anger and fear, which involve active environmental responses.
- This finding extends previous animal research, linking sensory perception to emotional processing in humans.
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