Experimental Brain Research

, Volume 233, Issue 3, pp 829–837

Handedness influences intermanual transfer in chimpanzees (Pan troglodytes) but not rhesus monkeys (Macaca mulatta)

  • Emily R. Boeving
  • Agnès Lacreuse
  • William D. Hopkins
  • Kimberley A. Phillips
  • Melinda A. Novak
  • Eliza L. Nelson
Research Article

DOI: 10.1007/s00221-014-4158-8

Cite this article as:
Boeving, E.R., Lacreuse, A., Hopkins, W.D. et al. Exp Brain Res (2015) 233: 829. doi:10.1007/s00221-014-4158-8

Abstract

Intermanual transfer refers to an effect, whereby training one hand to perform a motor task improves performance in the opposite untrained hand. We tested the hypothesis that handedness facilitates intermanual transfer in two nonhuman primate species: rhesus monkeys (N = 13) and chimpanzees (N = 52). Subjects were grouped into one of four conditions: (1) left-handers trained with the left (dominant) hand; (2) left-handers trained with the right (nondominant) hand; (3) right-handers trained with the left (nondominant) hand; and (4) right-handers trained with the right (dominant) hand. Intermanual transfer was measured using a task where subjects removed a Life Savers® candy (monkeys) or a washer (chimpanzees) from metal shapes. Transfer was measured with latency by comparing the average time taken to solve the task in the first session with the trained hand compared to the first session with the untrained hand. Hypotheses and predictions were derived from three models of transfer: access: benefit training with nondominant hand; proficiency: benefit training with dominant hand; and cross-activation: benefit irrespective of trained hand. Intermanual transfer (i.e., shorter latency in untrained hand) occurred regardless of whether monkeys trained with the dominant hand or nondominant hand, supporting the cross-activation model. However, transfer was only observed in chimpanzees that trained with the dominant hand. When handedness groups were examined separately, the transfer effect was only significant for right-handed chimpanzees, partially supporting the proficiency model. Findings may be related to neurophysiological differences in motor control as well as differences in handedness patterning between rhesus monkeys and chimpanzees.

Keywords

Handedness Hand preference Intermanual transfer Rhesus monkey Chimpanzee 

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Emily R. Boeving
    • 1
  • Agnès Lacreuse
    • 2
  • William D. Hopkins
    • 3
    • 4
  • Kimberley A. Phillips
    • 5
    • 6
  • Melinda A. Novak
    • 2
  • Eliza L. Nelson
    • 1
  1. 1.Department of PsychologyFlorida International UniversityMiamiUSA
  2. 2.Department of Psychological and Brain SciencesUniversity of Massachusetts AmherstAmherstUSA
  3. 3.Neuroscience Institute and Language Research CenterGeorgia State UniversityAtlantaUSA
  4. 4.Division of Developmental and Cognitive NeuroscienceYerkes National Primate Research CenterAtlantaUSA
  5. 5.Department of PsychologyTrinity UniversitySan AntonioUSA
  6. 6.Southwest National Primate Research CenterTexas Biomedical Research InstituteSan AntonioUSA

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