Table S3.

Correlation matrices underlying the path model in Fig. S2 that includes unranked variables

Variable	1	2	3	4
Study 1, n = 80
1. Self-related processing ROI	1
2. Social processing ROI	0.717***	1
3. Valuation ROI	0.856***	0.758***	1
4. Population-level virality	0.236*	0.235*	0.352**	1
Study 2, n = 76
1. Self-related processing ROI	1
2. Social processing ROI	0.868***	1
3. Valuation ROI	0.859***	0.851***	1
4. Population-level virality	0.107	0.163	0.256*	1

Population-level virality showed a positively skewed distribution and thus was log-transformed. Asterisks indicate statistical significance: *P < 0.05, **P < 0.01, ***P < 0.001.