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. 2014 Jun 2;111(24):8782–8787. doi: 10.1073/pnas.1402786111

Table 1.

Statistical summary of experiments

Experiment Dependent variable Male Female Control F statistics, P values, and effect sizes
Experiment 1 (n = 346) Predicted intensity (1 = not at all, 7 = very strong) Five male hurricanes Five female hurricanes
4.386 (0.822) 4.186 (0.907) F(1,344) = 18.055, P < 0.0001, ɳ2 = 0.050
Experiment 2 (n = 108) Perceived risk (1 = not at all, 7 = very risky) Hurricane Alexander Hurricane Alexandra Hurricane (control)
4.764 (1.086) 4.069 (1.412) 4.048 (1.227) F(2,102) = 3.652, P = 0.029, ɳ2 = 0.064
Experiment 3 (n = 142) Evacuation intention (1 = evacuate immediately, 7 = stay home) Hurricane Christopher Hurricane Christina
2.343 (1.212) 2.939 (1.538) F(1,138) = 6.543, P = 0.012, ɳ2 = 0.044
Experiment 4 (n = 100) Evacuation intention (1 = certainly will follow, 7 = certainly will not follow) Hurricane Danny Hurricane Kate
2.160 (1.344) 2.900 (1.658) F(1,96) = 4.469, P = 0.037, ɳ2 = 0.043
Experiment 5 (n = 274) Evacuation intention (1 = very unlikely to follow, 7 = very likely to follow) Hurricane Victor Hurricane Victoria Hurricane (control)
5.861 (1.275) 5.391 (1.614) 5.278 (1.552) F(2,268) = 3.796, P = 0.024, ɳ2 = 0.027
Experiment 6 (n = 201) Evacuation intention (1 = very unlikely to follow, 7 = very likely to follow) Hurricane Alexander Hurricane Alexandra
6.061 (0.882) 5.586 (1.152) F(1,197) = 11.055, P = 0.001, ɳ2 = 0.053

Numbers in parentheses are SDs. Experiment 1, 346 participants reported similar predictions of the intensity across five hurricanes with a male’s name and across five hurricanes with a female’s name, and we therefore collapsed them. A one-way repeated-measure ANOVA was conducted. Experiments 2–6, the mean estimations are based on main effects of the gender of hurricane name in two-way ANOVAs, with the gender of the hurricane name and participants’ sex as independent variables. It should be noted that using ANCOVAs with the gender of hurricane name as a predictor and participants’ sex as a covariate generated almost identical statistical results. Effect sizes are presented with ɳ2 and their interpretation is analogous to R2.