Table S3.

Voting preferences by group for study 2

Voting preferencesMean (SE)Kruskal–Wallis (χ2)Mann–Whitney u
Group 1 (Gillard bias)Group 2 (Abbott bias)Group 3 (control)
PreImpressionAbbott7.40 (0.07)7.36 (0.08)7.37 (0.07)0.458241,861.5
PreImpressionGillard7.13 (0.07)7.12 (0.08)7.13 (0.07)0.081243,115.0
PreTrustAbbott7.26 (0.07)7.22 (0.08)7.18 (0.07)0.954241,924.5
PreTrustGillard6.95 (0.07)6.89 (0.08)6.92 (0.07)0.222241,779.0
PreLikeAbbott6.42 (0.08)6.39 (0.08)6.23 (0.08)2.987243,677.5
PreLikeGillard6.24 (0.08)6.30 (0.08)6.11 (0.08)3.178239,556.0
PostImpressionAbbott4.61 (0.09)6.88 (0.09)5.53 (0.09)289.065***120,660.0***
PostImpressionGillard6.87 (0.08)4.95 (0.09)6.21 (0.09)237.034***133,106.5***
PostTrustAbbott4.56(0.10)6.94 (0.09)5.57 (0.10)281.560***121,786.5***
PostTrustGillard6.84 (0.09)4.95 (0.09)6.19 (0.09)221.709***136,689.0***
PostLikeAbbott4.55 (0.09)6.31 (0.09)5.21 (0.09)177.225***146,957.0***
PostLikeGillard6.34(0.09)4.64 (0.09)5.71 (0.09)176.066***147,372.5***
  • ***P < 0.001: Kruskal–Wallis tests were conducted between all three groups, and Mann–Whitney u tests were conducted between groups 1 and 2. Preferences were measured for each candidate separately on 10-point Likert scales.