In this experiment, participants consumed what they believed to be either a two-egg or four-egg omelet on separate mornings; however, they were actually fed a three-egg omelet on both days. Interestingly, when participants ate what they believed to be the smaller omelet, they felt hungrier and consumed more calories throughout the day than on the day when they thought they had eaten the bigger omelet. The results confirm that an individual’s expectations can have an impact on their subsequent feelings of hunger and fullness, as well as their later calorie consumption.
British Psychological Society, September 2017