International Journal of Primatology

, Volume 28, Issue 6, pp 1315–1326 | Cite as

Handedness and Grooming in Pan troglodytes: Comparative Analysis Between Findings in Captive and Wild Individuals

  • William D. Hopkins
  • Jamie L. Russell
  • Margaret Remkus
  • Hani Freeman
  • Steven J. Schapiro


Grooming is a complex set of motor actions, common in highly social primates. We tested for asymmetries in hand use during unimanual and bimanual allogrooming in 215 captive chimpanzees. In addition to hand use, we coded in the ethogram whether the manual grooming action co-occurred with the use of the mouth. Overall, grooming did not elicit strong handedness at the individual level, but there is a small yet significant population-level right-hand bias for bimanual grooming. Mouth use during grooming had no influence on hand use. A comparison of the findings with previously published data on handedness for grooming in wild chimpanzees suggests that wild apes are more right-handed than captive individuals are for allogrooming. Collectively, the results suggest that role differentiation of the hands is an important factor in the assessment of handedness for grooming, and perhaps additional manual actions of chimpanzees and other primates.


bimanual hand use chimpanzees grooming laterality 


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • William D. Hopkins
    • 1
    • 2
  • Jamie L. Russell
    • 1
  • Margaret Remkus
    • 3
  • Hani Freeman
    • 1
  • Steven J. Schapiro
    • 3
  1. 1.Division of PsychobiologyYerkes National Primate Research CenterAtlantaUSA
  2. 2.Department of PsychologyAgnes Scott CollegeDecaturUSA
  3. 3.Department of Veterinary SciencesThe University of Texas M. D. Anderson Cancer CenterBastropUSA

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