Evidence for proactive and reactive helping in two- to five-year-olds from a small-scale society

• Hilary Aime,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Resources, Visualization, Writing – original draft, Writing – review & editing

  Affiliation Department of Psychology, Simon Fraser University, Burnaby, British Columbia, Canada

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• Tanya Broesch ,

  Roles Conceptualization, Methodology, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing

  * E-mail: tanya_broesch@sfu.ca

  Affiliation Department of Psychology, Simon Fraser University, Burnaby, British Columbia, Canada

  http://orcid.org/0000-0002-5937-5144

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• Lara B. Aknin,

  Roles Conceptualization, Methodology, Project administration, Supervision, Writing – review & editing

  Affiliation Department of Psychology, Simon Fraser University, Burnaby, British Columbia, Canada

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• Felix Warneken

  Roles Conceptualization, Data curation, Methodology, Supervision, Writing – review & editing

  Affiliation Department of Psychology, University of Michigan, Ann Arbor, Michigan, United States of America

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