“…A spontaneous tendency to prefer prosocial behavior has been observed in infants aged between 3 and 36 months, when they are exposed to a variety of competing social scenarios: helping versus hindering agents (e.g., involved in climbing a hill or opening a box); comforting versus threatening agents; fairly acting versus unfairly acting agents; or game-playing versus game-breaking agents (Holvoet et al, 2016a). In these studies, infants' preferences for prosocial agents were demonstrated through their reaching behavior (Buon et al, 2014;Burns & Sommerville, 2014;Geraci & Surian, 2011;Hamlin & Wynn, 2011;Hamlin, Wynn, & Bloom, 2007;Scola, Holvoet, Arciszewski, & Picard, 2015) or their looking behavior (Hamlin & Wynn, 2011;Hamlin, Wynn, & Bloom, 2010). Other studies, however, adopted infant's choice by reaching and geometric figures (or toys) as agents and failed to highlight a preference for prosocial agents (Cowell & Decety, 2015;Salvadori et al, 2015), thereby questioning the robustness of infants' preference for prosocial agents.…”