Meguerditchian Adrien, Phillips Kimberley A, Chapelain Amandine, Mahovetz Lindsay M, Milne Scott, Stoinski Tara, Bania Amanda, Lonsdorf Elizabeth, Schaeffer Jennifer, Russell Jamie, Hopkins William D
CNRS, Laboratory of Cognitive Psychology, UMR 7290, Brain and Language Research Institute, Aix-Marseille University , Marseille, France.
Department of Psychology, Trinity University , San Antonio, TX, USA.
Front Psychol. 2015 Nov 23;6:1794. doi: 10.3389/fpsyg.2015.01794. eCollection 2015.
A number of factors have been proposed to influence within and between species variation in handedness in non-human primates. In the initial study, we assessed the influence of grip morphology on hand use for simple reaching in a sample of 564 great apes including 49 orangutans Pongo pygmaeus, 66 gorillas Gorilla gorilla, 354 chimpanzees Pan troglodytes and 95 bonobos Pan paniscus. Overall, we found a significant right hand bias for reaching. We also found a significant effect of the grip morphology of hand use. Grasping with the thumb and index finger was more prevalent in the right compared to left hand in all four species. There was no significant sex effect on the patterns of handedness. In a subsample of apes, we also compared consistency in hand use for simple reaching with previously published data on a task that measures handedness for bimanual actions. We found that the ratio of subjects with consistent right compared to left hand use was more prevalent in bonobos, chimpanzees and gorillas but not orangutans. However, for all species, the proportion of subjects with inconsistent hand preferences between the tasks was relatively high suggesting some measures may be more sensitive in assessing handedness than others.
已有多种因素被提出用以影响非人类灵长类动物种内和种间的用手习惯差异。在最初的研究中，我们在564只大型猿类样本中评估了抓握形态对简单伸手动作中用手习惯的影响，这些大型猿类包括49只红毛猩猩（婆罗洲猩猩）、66只大猩猩、354只黑猩猩和95只倭黑猩猩。总体而言，我们发现伸手动作存在显著的右手偏好。我们还发现抓握形态对用手习惯有显著影响。在所有四个物种中，用拇指和食指抓握在右手中比在左手中更为普遍。用手习惯模式上不存在显著的性别效应。在猿类的一个子样本中，我们还将简单伸手动作中的用手习惯一致性与之前发表的一项测量双手动作用手习惯任务的数据进行了比较。我们发现，在倭黑猩猩、黑猩猩和大猩猩中，右手使用一致的受试者与左手使用一致的受试者的比例更高，但在红毛猩猩中并非如此。然而，对于所有物种来说，不同任务之间用手偏好不一致的受试者比例相对较高，这表明某些测量方法在评估用手习惯方面可能比其他方法更敏感。
