AUTHOR=Pletti Carolina , Scheel Anne , Paulus Markus TITLE=Intrinsic Altruism or Social Motivation—What Does Pupil Dilation Tell Us about Children's Helping Behavior? JOURNAL=Frontiers in Psychology VOLUME=8 YEAR=2017 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2017.02089 DOI=10.3389/fpsyg.2017.02089 ISSN=1664-1078