Emotional valence, not arousal, influences taste perception

Area of Science:

• Psychology
• Neuroscience
• Sensory Science

Background:

• Emotional states are known to affect sensory perception, including taste.
• The precise mechanisms linking emotions to taste perception, particularly valence and arousal, require further elucidation.

Purpose of the Study:

• To investigate the influence of emotional valence and arousal on taste intensity.
• To explore semantic priming as a potential mechanism for the effect of emotional valence on taste perception.

Main Methods:

• Experiment 1: Evoked emotional states (valence, arousal) using video stimuli and measured taste intensity.
• Experiment 2: Modulated conceptual associations between emotion-taste concepts via a cognitive task, then examined taste perception after auditory emotional stimuli.

Main Results:

• Emotional valence, not arousal, significantly influenced the intensity of sweetness and bitterness.
• Negative emotions intensified bitterness perception, supporting the role of semantic priming.
• Taste perception changes varied between sweetness and bitterness based on emotional states.

Conclusions:

• Emotional valence plays a key role in modulating taste perception, particularly bitterness.
• Semantic priming, driven by conceptual associations between negative emotions and bitterness, underlies this effect.
• Findings contribute to understanding the complex interplay between emotion and gustatory experience.