The term portion size is used differently by food manufacturers, regulatory agencies, and consumers. As such, it is unclear how information about portion size may influence perceived satiety and intake of foods by consumers. The objective of this study was to examine how portion size information influences satiety and intake, and how consumers interpret the term portion size. A randomized controlled design was used in which subjects were served a lunch meal consisting of a preload of pasta followed by ad libitum servings of the same pasta.
