00346nam a2200109Ia 4500008004100000245010000041260004900141260000900190300001000199500001100209650001600220170224s9999    xx            000 0 und d  aCoresidence duration and cues of maternal investment regulate sibling altruism across cultures.  bJournal of Personality and Social Psychology  c2016  a111:2  aAugust  xPsychology.