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behavior
You consume more when portion sizes are labeled as units.
The unit bias explains why people eat or use more when a quantity is presented as a single item.
A 2006 study showed that people consumed more when they were offered a single large portion rather than two smaller ones, even if the total volume was equivalent.
You trust the package to define your limits, not your own appetite.
Where this comes from
- Study
- Geier, Wansink, and Rozin, 2006, Psychological Science
- What the check found
- The citation is correct, and the definition of unit bias provided in the claim accurately reflects the findings of the 2006 Geier, Wansink, and Rozin paper.
- Confidence
- Well replicated
Related
One of these every day, and every one names the study it came from. When a finding is contested, it says so.