Speaker
Description
In this study, we investigated the influence of appetite on automatic approach tendencies and inhibitory responses toward food stimuli and whether this effect is modulated by the actual availability of food.
Forty-three healthy weight participants (21 males) completed an approach-avoidance paradigm aimed at assessing the approach bias for food and a Go/No-Go task aimed at assessing behavioural inhibition with personalized food pictures. Participants performed the tasks in two conditions: after prolonged fasting (hunger), and after lunch (satiety). Two versions of each task were administered: one with pictures of foods that were available for actual consumption after the experiment, and one with foods that were unavailable for consumption. After task performance, the most liked high-calorie and low-calorie foods were offered, and food intake was measured.
Approach-Avoidance paradigm: we observed lower approach bias for high-calorie and low-calorie foods in the satiety vs. hunger condition, but only for unavailable foods.
Go/No-Go task: we observed no significant effect of satiety on behavioural inhibition. However, participants showed greater inhibitory capacity in response to high-calorie vs. low-calorie foods, but only for those available for immediate consumption.
After the experiment, participants ate more calories in the fasting condition, and a greater proportion of calories from low-calorie foods.
Our results suggest that satiety fails to down-regulate the approach tendencies for food when it is available for immediate consumption. This failure seems compensated by a greater behavioural inhibition toward high-calorie vs low-calorie foods that is selective for those available for immediate consumption.
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