US FDA/CFSAN - Effects of Strength of Science Disclaimers on the Communication Impacts of Health Claims
November 17, 2005
US FDA/CFSAN
Effects of Strength of Science Disclaimers on the Communication Impacts of Health Claims
November 17, 2005
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Effect of Omitting "may"
- Unexpected reversal for perceived health importance--significantly more negative if claim stated without "may" (a "boomerang effect")
- Exception--B level claim (omega-3/tuna), where more positive ratings when "may" omitted for scientific certainty and "other benefits"
