Hopkins W D
Division of Behavioral Biology, Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322.
J Comp Psychol. 1993 Jun;107(2):162-8. doi: 10.1037/0735-7036.107.2.162.
Hand preference in reaching was assessed under 2 postural adjustment conditions in 40 chimpanzees (Pan troglodytes) and 9 orangutans (Pongo pygmaeus). The postural conditions were quadrupedal and upright, during which reaching for food was scored on a minimum of 50 trials. Results indicated no population preference during quadrupedal reaching but a right-hand population preference was found during upright reaching. There were no significant effects of age or sex on either the direction or strength of hand preference. Early rearing history affected the strength of hand preference but not direction. The results suggest that posture is an important factor in the assessment of hand preference in great apes and may have important evolutionary consequences.
在40只黑猩猩（黑猩猩属）和9只红毛猩猩（婆罗洲猩猩）中，于两种姿势调整条件下评估了取物时的手偏好。姿势条件为四足和直立，在此期间，至少进行50次取食试验并进行评分。结果表明，在四足取物时没有群体偏好，但在直立取物时发现右手群体偏好。年龄或性别对手偏好的方向或强度均无显著影响。早期饲养经历影响手偏好的强度，但不影响方向。结果表明，姿势是评估大型猿类手偏好的一个重要因素，可能具有重要的进化意义。
