Table S2.
Voting preferences by group for study 1
| Experiment | Voting preferences | Mean (SE) | Kruskal–Wallis (χ2) | Mann–Whitney u | ||
| Group 1 (Gillard bias) | Group 2 (Abbott bias) | Group 3 (control) | ||||
| 1 | PreImpressionAbbott | 8.09 (0.34) | 7.74 (0.40) | 7.41 (0.26) | 3.979 | 525.0 |
| PreImpressionGillard | 7.06 (0.42) | 7.47 (0.35) | 6.88 (0.32) | 1.395 | 529.5 | |
| PreTrustAbbott | 7.82 (0.31) | 7.85 (0.39) | 7.35 (0.28) | 3.275 | 538.5 | |
| PreTrustGillard | 6.38 (0.40) | 7.56 (0.30) | 6.88 (0.32) | 5.213 | 407.0 | |
| PreLikeAbbott | 6.06 (0.52) | 5.68 (0.47) | 5.79 (0.38) | 0.296 | 538.5 | |
| PreLikeGillard | 5.29 (0.48) | 5.76 (0.41) | 5.29 (0.37) | 1.335 | 500.0 | |
| PostImpressionAbbott | 4.24 (0.49) | 7.29 (0.51) | 5.85 (0.38) | 19.029*** | 252.0*** | |
| PostImpressionGillard | 7.26 (0.45) | 4.71 (0.47) | 5.65 (0.46) | 14.667** | 286.0** | |
| PostTrustAbbott | 4.59 (0.43) | 7.32 (0.51) | 6.15 (0.38) | 18.385*** | 260.5*** | |
| PostTrustGillard | 6.91 (0.42) | 4.97 (0.43) | 6.15 (0.40) | 10.809** | 326.5** | |
| PostLikeAbbott | 3.88 (0.43) | 6.24 (0.58) | 5.18 (0.42) | 11.026** | 341.5** | |
| PostLikeGillard | 5.68 (0.49) | 4.15 (0.45) | 5.41 (0.42) | 5.836 | 403.0* | |
| 2 | PreImpressionAbbott | 6.76 (0.43) | 7.50 (0.34) | 6.76 (0.44) | 1.761 | 477.0 |
| PreImpressionGillard | 6.50 (0.36) | 7.29 (0.43) | 6.12 (0.45) | 4.369 | 449.5 | |
| PreTrustAbbott | 6.41 (0.44) | 7.12 (0.30) | 7.32 (0.44) | 2.700 | 499.0 | |
| PreTrustGillard | 6.56 (0.41) | 7.32 (0.36) | 6.35 (0.43) | 3.094 | 465.0 | |
| PreLikeAbbott | 5.56 (0.46) | 5.65 (0.43) | 5.76 (0.49) | 0.170 | 575.0 | |
| PreLikeGillard | 5.79 (0.44) | 5.79 (0.48) | 5.47 (0.45) | 0.306 | 568.0 | |
| PostImpressionAbbott | 3.79 (0.41) | 7.15 (0.49) | 5.24 (0.48) | 20.878*** | 226.5*** | |
| PostImpressionGillard | 7.35 (0.39) | 4.79 (0.47) | 6.00 (0.38) | 15.270*** | 279.5*** | |
| PostTrustAbbott | 3.82 (0.40) | 7.18 (0.47) | 5.53 (0.51) | 21.917*** | 207.5*** | |
| PostTrustGillard | 7.32 (0.41) | 4.97 (0.46) | 6.18 (0.36) | 13.410** | 302.0** | |
| PostLikeAbbott | 3.91 (0.42) | 6.09 (0.53) | 5.56 (0.48) | 9.822** | 353.0** | |
| PostLikeGillard | 6.68 (0.45) | 4.29 (0.48) | 5.79 (0.40) | 12.905** | 311.5** | |
| 3 | PreImpressionAbbott | 7.24 (0.39) | 7.18 (0.39) | 7.88 (0.27) | 1.346 | 568.5 |
| PreImpressionGillard | 6.12 (0.43) | 7.09 (0.39) | 7.26 (0.34) | 4.134 | 452.0 | |
| PreTrustAbbott | 7.18 (0.35) | 6.41 (0.41) | 7.53 (0.32) | 3.837 | 478.0 | |
| PreTrustGillard | 6.65 (0.38) | 6.68 (0.40) | 6.97 (0.33) | 0.259 | 568.5 | |
| PreLikeAbbott | 6.59 (0.42) | 5.94 (0.39) | 6.59 (0.43) | 2.301 | 491.0 | |
| PreLikeGillard | 5.85 (0.46) | 5.85 (0.43) | 6.26 (0.41) | 1.065 | 576.5 | |
| PostImpressionAbbott | 5.29 (0.48) | 6.82 (0.41) | 6.26 (0.48) | 5.512 | 384.0* | |
| PostImpressionGillard | 6.50 (0.45) | 5.47 (0.43) | 6.21 (0.48) | 3.027 | 445.5 | |
| PostTrustAbbott | 5.38 (0.49) | 6.85 (0.45) | 6.47 (0.47) | 5.091 | 399.0* | |
| PostTrustGillard | 6.44 (0.45) | 5.76 (0.47) | 6.29 (0.44) | 1.365 | 493.0 | |
| PostLikeAbbott | 5.29 (0.48) | 6.03 (0.48) | 5.79 (0.53) | 1.129 | 487.0 | |
| PostLikeGillard | 6.12 (0.47) | 5.26 (0.54) | 6.09 (0.51) | 1.475 | 491.5 | |
*
P < 0.05; **P < 0.01; and ***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.