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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1869 1
1986 2
1996 1
2003 1
2004 1
2005 6
2006 8
2007 7
2008 10
2009 13
2010 10
2011 11
2012 10
2013 5
2014 12
2015 7
2016 11
2017 7
2018 6
2019 5
2020 6
2021 16
2022 12
2023 2
2024 0

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Similar articles for PMID: 19137389

142 results

Results by year

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Page 1
Chimpanzees help each other upon request.
Yamamoto S, Humle T, Tanaka M. Yamamoto S, et al. PLoS One. 2009 Oct 14;4(10):e7416. doi: 10.1371/journal.pone.0007416. PLoS One. 2009. PMID: 19826478 Free PMC article.
Varieties of altruism in children and chimpanzees.
Warneken F, Tomasello M. Warneken F, et al. Trends Cogn Sci. 2009 Sep;13(9):397-402. doi: 10.1016/j.tics.2009.06.008. Epub 2009 Aug 27. Trends Cogn Sci. 2009. PMID: 19716750 Review.
Spontaneous prosocial choice by chimpanzees.
Horner V, Carter JD, Suchak M, de Waal FB. Horner V, et al. Proc Natl Acad Sci U S A. 2011 Aug 16;108(33):13847-51. doi: 10.1073/pnas.1111088108. Epub 2011 Aug 8. Proc Natl Acad Sci U S A. 2011. PMID: 21825175 Free PMC article.
Evolutionary foundations of human prosocial sentiments.
Silk JB, House BR. Silk JB, et al. Proc Natl Acad Sci U S A. 2011 Jun 28;108 Suppl 2(Suppl 2):10910-7. doi: 10.1073/pnas.1100305108. Epub 2011 Jun 20. Proc Natl Acad Sci U S A. 2011. PMID: 21690372 Free PMC article.
Chimpanzees return favors at a personal cost.
Schmelz M, Grueneisen S, Kabalak A, Jost J, Tomasello M. Schmelz M, et al. Proc Natl Acad Sci U S A. 2017 Jul 11;114(28):7462-7467. doi: 10.1073/pnas.1700351114. Epub 2017 Jun 19. Proc Natl Acad Sci U S A. 2017. PMID: 28630319 Free PMC article.
142 results