Changing portion size labels of main courses to encourage selection of smaller portions when dining out: A randomized controlled field experiment.
Hua SV; Roberto CA; Yam E; Leone E; Gibson LA; Rimm EB · 2026 · Appetite
WASTE classifies this as Negative / Null Result Report · AI classification, approximate
The study found no significant effect — useful as a negative control or null benchmark for your own design.
Abstract (excerpt)
Large portions contribute to excess consumption. We tested whether a portion size labeling intervention influenced consumers to select smaller lunch portions. Two cafés introduced a reduced-sized main course (half the original size and…
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Metadata source: Europe PMC · DOI 10.1016/j.appet.2026.108494