Table 1. Group identity levels of the pro-vaccine and anti-vaccine groups.

Identity	Pro-vaccine	Anti-vaccine	F(1,348)	P
Importance	M = 5.40, SD = 1.11	M = 4.64, SD = 1.35	32.94	< .001
Commitment	M = 5.51, SD = 1.09	M = 4.74, SD = 1.27	51.44	< .001
Superiority	M = 5.23, SD = 1.19	M = 4.70, SD = 1.29	25.11	< .001
Deference	M = 5.19, SD = 1.16	M = 4.61, SD = 1.34	29.28	< .001
Total	M = 5.33, SD = 1.06	M = 4.67, SD = 1.22	29.45	< .001