Modality Matters: Fasted Individuals Inhibit Food Stimuli Better Than Neutral Stimuli for Words, but Not for...

Area of Science:

• Cognitive Neuroscience
• Neuroscience of Eating
• Behavioral Psychology

Background:

• Inhibitory control is crucial for regulating food intake.
• The modality (pictures vs. words) and homeostatic state (fasting vs. satiation) may influence inhibitory control over food stimuli.
• Understanding these interactions can inform strategies for weight management.

Purpose of the Study:

• To investigate how different food stimulus modalities (pictures vs. words) affect inhibitory control in fasted versus satiated individuals.
• To determine if effects are specific to food stimuli compared to non-food stimuli.
• To explore the role of homeostatic state in modulating cognitive control over food cues.

Main Methods:

• Participants (N=143) were assigned to either a 16-hour fasting group or a usual-meal satiated group.
• An online stop-signal task was administered, featuring modal (pictures) and amodal (words) food and non-food stimuli.
• Inhibitory control performance was measured by reaction times and accuracy on the stop-signal task.

Main Results:

• A significant interaction revealed that fasted individuals exhibited similar inhibitory control for modal and amodal food stimuli.
• Fasted participants showed better inhibitory control for non-food words compared to non-food images.
• Satiated individuals displayed no significant differences in inhibitory control across stimulus modalities or types.

Conclusions:

• Inhibitory control over food stimuli is modulated by the individual's homeostatic state, specifically fasting.
• The modality of food stimuli interacts with fasting state to influence inhibitory capacity.
• These findings suggest potential targets for interventions aimed at improving dietary adherence and weight loss.