Table A2. Beta Coefficients in the Mediation Analysis in Study 2.

	Child			Older adult
Effect	β	b [95% CI]	p	β	b [95% CI]	p
Note. A negative coefficient reflects lower probability perceptions and less advice to stay home for the risk message compared to the control group where participants did not see the message. Letters reflect the pathways in the mediation model illustrated in Figure A1. COVID-19 = coronavirus disease.
Effect of risk message on probability perceptions (a)
Infection	−0.08	−2.55 [−11.02, 5.93]	.554	−0.13	−4.20 [−13.40, 4.99]	.369
Severe symptoms	−0.05	−1.00 [−6.64, 4.64]	.727	−0.12	−3.49 [−11.43, 4.44]	.386
Direct effect on recommendations to stay home of:
Risk message (c’)	0.25	0.22 [−0.02, 0.46]	.067	−0.10	−0.06 [−0.24, 0.12]	.526
Probability perception (b)
Infection	0.14	0.004 [−0.0003, 0.01]	.067	−0.002	0.00001 [−0.003, 0.003]	.984
Severe symptoms	0.19	0.01 [0.002, 0.01]	.013	0.18	0.004 [0.0004, 0.008]	.032
Indirect (mediated) effect of risk message on advice to stay home (ab)	—	−0.02 [−0.09, 0.05]	—	—	−0.01 [−0.06, 0.02]	—
Mediation by infection probability perception	—	−0.01 [−0.06, 0.03]	—	—	0.0001 [−0.02, 0.03]	—
Mediation by severe symptoms probability perception	—	−0.01 [−0.07, 0.04]	—	—	−0.01 [−0.06, 0.02]	—