When encouraged to eat as much as they want, people tend to eat less if the foods are offered in smaller rather than larger portion sizes. This illustrates

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This phenomenon is known as unit bias, which refers to the tendency for individuals to consume a certain amount of food based on a perceived unit or serving size. In other words, people often assume that a certain amount of food is a "normal" or appropriate serving size and will adjust their intake accordingly, regardless of the actual quantity of food presented. By offering smaller portion sizes, individuals may be more likely to perceive them as a typical serving size and consume less overall.

When Encouraged to Eat as Much as They Want, People