Meunier Hélène, Vauclair Jacques
Ethologie des Primates, IPHC, DEPE, UMR 7178 CNRS-ULP, Strasbourg, France.
Am J Primatol. 2007 Sep;69(9):1064-9. doi: 10.1002/ajp.20437.
This study examined hand preference in white-faced capuchins on a unimanual task and on a coordinated bimanual task. For the unimanual task, handedness was assessed by observing simple reaching for small grains. For the bimanual task, tubes lined with chocolate paste inside were presented to the capuchins. The hand and the finger(s) used to remove chocolate paste were recorded. Seven individuals out of eight in the reaching task and 12 out of 13 in the tube task exhibited a hand preference. Moreover, test-retest correlations showed stability in hand use across time for the coordinated bimanual task. We found no significant differences in strength of hand preference between sexes. Finally, as noted in other primate species, the capuchins were more lateralized in the bimanual task compared to the unimanual task.
本研究考察了白面卷尾猴在单手动任务和协调性双手任务中的用手偏好。对于单手动任务，通过观察抓取小颗粒的简单动作来评估利手情况。对于双手任务，向卷尾猴展示内部涂有巧克力酱的管子。记录它们用来去除巧克力酱的手和手指。在伸手抓取任务中，8只中有7只，在管子任务中，13只中有12只表现出用手偏好。此外，重测相关性表明，在协调性双手任务中，用手情况随时间具有稳定性。我们发现两性之间在用手偏好强度上没有显著差异。最后，正如在其他灵长类物种中所观察到的，与单手动任务相比，卷尾猴在双手任务中的偏侧化程度更高。
