Sizing up the Effect of Portion Size on Consumption: A Meta-Analytic Review

Food marketing is facing increasing challenges in using portion size (e.g., “supersizing”) as a marketing tool. Marketers have used portion size to attract customers and encourage purchase, but social agencies are expressing concern that larger portion sizes encourage greater consumption, which can cause excessive consumption and obesity. This article addresses two questions that are central to this debate: (1) How much effect does portion size...