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Effect of visualising and re-expressing evidence of policy effectiveness on perceived effectiveness: a population-based survey experiment

Author

Listed:
  • Reynolds, James P.
  • Hobson, Alice
  • Ventsel, Minna
  • Pilling, Mark A.
  • Marteau, Theresa M.
  • Hollands, Gareth J.

Abstract

Communicating evidence that a policy is effective can increase public support although the effects are small. In the context of policies to increase healthier eating in out-of-home restaurants, we investigate two ways of presenting evidence for a policy's effectiveness: (i) visualising and (ii) re-expressing evidence into a more interpretable form. We conducted an online experiment in which participants were randomly allocated to one of five groups. We used a 2 (text only vs visualisation) × 2 (no re-expression vs re-expression) design with one control group. Participants (n = 4500) representative of the English population were recruited. The primary outcome was perceived effectiveness and the secondary outcome was public support. Evidence of effectiveness increased perceptions of effectiveness (d = 0.14, p

Suggested Citation

  • Reynolds, James P. & Hobson, Alice & Ventsel, Minna & Pilling, Mark A. & Marteau, Theresa M. & Hollands, Gareth J., 2025. "Effect of visualising and re-expressing evidence of policy effectiveness on perceived effectiveness: a population-based survey experiment," Behavioural Public Policy, Cambridge University Press, vol. 9(4), pages 709-727, October.
    • Handle: RePEc:cup:bpubpo:v:9:y:2025:i:4:p:709-727_4
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