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November 17, 2005

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Effects of Strength of Science Disclaimers
on the Communication Impacts of Health Claims

[Transcript of Dr. Derby's remarks]

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Author: Brenda M. Derby, Ph.D. and Alan S. Levy, Ph.D., FDA

Table of Contents
  1. Effects of Strength of Science Disclaimers on the Communication Impacts of Health Claims
  2. Information Objective
  3. Operational Definitions
  4. FDA Study Health Claim Statements
  5. FDA Study
  6. Four Disclaimer Schemes
  7. Point-Counterpoint Scheme
  8. Embedded Scheme
  9. Text Report Card Scheme
  10. Graphic Report Card Scheme
  11. Experimental Design and Methods
  12. Four Experimental Labels
  13. Orange Juice: No Claims Control
  14. Tuna: Embedded, Level B Claim
  15. Eggs: Text Report Card, Level C Claim
  16. Spaghetti Sauce: Graphic Report Card, Level D Claim
  17. Four Performance Measures of Label Impacts
  18. Four Performance Measures of Label Impacts
  19. Perceived Strength of Scientific Evidence Measure
  20. Four Performance Measures of Label Impacts
  21. Claim-Relevant and Other Health Benefit Measures
  22. Four Performance Measures of Label Impacts
  23. Health Importance Measure
  1. Control Conditions To Assess Communication Effectiveness
  2. Communication Effectiveness Performance Standards
  3. Do disclaimers convey decreasing levels of scientific support?
  4. Is perceived scientific certainty affected when a disclaimer is present?
  5. Are inferences about the health benefits of a product affected?
  6. RESULTS
  7. Effect of Disclaimer Level by. Disclaimer Scheme
  8. Linear Effect of Disclaimers
  9. Analysis Note
  10. Key Effects on Product Perceptions
  11. Effects on Scientific Certainty
  12. Perceived Relevant Health Benefits
  13. Other Perceived Health Benefits
  14. Perceived Health Importance
  15. Effect of Omitting "may"
  16. Unqualified Health Claim Statement v. Nutrient Declaration/Content Claim
  17. Effects of "Full Information"
  18. Conclusions
  19. Do Disclaimers Work?
  20. Health Claim Effects
  21. Other Effects
  22. Further Information

Public Meeting: Assessing Consumers' Perceptions of Health Claims November 17, 2005

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