Tricking the brain into eating less by serving food on a smaller plate may not work. A new study debunks the popular diet trick based on the Delbouef illusion, and suggests that when people are food-deprived, they're more likely to identify a portion size accurately, no matter how it is served.

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Tricking the brain into eating less by serving food on a smaller plate may not work. A new study debunks the popular diet trick based on the Delbouef illusion, and suggests that when people are food-deprived, they're more likely to identify a portion size accurately, no matter how it is served.