%0 Journal Article %A Hepach, Robert %A Vaish, Amrisha %A Kano, Fuhimiro %A Benziad, Leïla %A Call, Josep %A Tomasello, Michael %+ Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society %T Chimpanzees’ (Pan troglodytes) internal arousal remains elevated if they cannot themselves help a conspecific : %G eng %U https://hdl.handle.net/21.11116/0000-0007-A1D9-E %R 10.1037/com0000255 %D 2021 %* Review method: peer-reviewed %J Journal of Comparative Psychology %V 135 %N 2 %& 196 %P 196 - 207 %I American Psychological Association (PsycARTICLES) %C Baltimore, Md. %@ 0735-7036