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. 2018 Jan 9;18(1):127–142. doi: 10.3758/s13415-017-0557-1

Fig. 3.

Fig. 3

Mean frequency (%) and standard errors (as indicated by the error bars) of prosocial choices per interaction partner. Significant differences are indicated by an asterisk (*). *p < .005, ** p < .01, *** p < .001