Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Mean (+SEM) percentage of prosocial choices by actors in experimental and no-partner control conditions. Asterisks refer to the outcome of a heterogeneity G-test on token choices by the individual subject (n = 7) against a 50% expectation (**P < 0.01). NS, not significant.
