Volition as a modulator of the intergroup empathy bias.

Neural reactions to others' pain are usually lower when the individual is of a different ethnicity than when they are of the same ethnicity. This suggests that empathy is not only an automatic phenomenon but also a motivated one. In the present study, we tested whether one's willingness to increase or decrease empathy would correspondingly increase or decrease the neural empathic response, as measured with electroencephalography (EEG), irrespective of ethnicity. In Study 1, participants were presented with pictures displaying painful or non-painful stimulations on an individual from a similar or different ethnic group. In Study 2, the procedure was relatively similar but employed a within-subject design and was conducted in two countries: Belgium and Rwanda. Overall, EEG results showed that participants successfully increased their neural response to the pain of others, irrespective of the others' ethnicity in Study 1. However, the within-subject design used in Study 2 revealed additional nuances, as we observed that participants increased their neural pain response selectively toward ingroup individuals. Our findings indicate that observing the pain of a single person, regardless of ethnicity, can heighten one's neural reaction. Yet, when both ingroup and outgroup members are present, the neural response intensifies only for ingroup members.