110只黑猩猩（Pan troglodytes）在协调的双手任务中的用手偏好：横断面分析

Hand preferences for a coordinated bimanual task in 110 chimpanzees (Pan troglodytes): cross-sectional analysis.

作者信息

Hopkins W D

机构信息

Division of Behavioral Biology, Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322, USA.

出版信息

J Comp Psychol. 1995 Sep;109(3):291-7. doi: 10.1037/0735-7036.109.3.291.

DOI:10.1037/0735-7036.109.3.291

PMID:7554825

Abstract

Hand preference for a coordinated bimanual task was assessed in a sample of 110 chimpanzees (Pan troglodytes). Subjects were presented with opaque tubes, the inside of which was coated with peanut butter. The hand and finger used to extract the peanut butter was recorded in 2 test sessions. A population right-hand bias was found. Juvenile and adolescent subjects were less lateralized than adults. All subjects primarily used their index finger to extract peanut butter. Use of the index finger was higher in adults and adolescents compared with juveniles. The results suggest that coordinated bimanual tasks (a) elicit strong hand preferences at the individual level and (b) elicit population level right-handedness.

摘要

在110只黑猩猩（黑猩猩属）的样本中评估了它们在协调双手任务中的用手偏好。给受试对象呈现不透明的管子，管子内部涂有花生酱。在两个测试环节中记录用于取出花生酱的手和手指。发现了群体右手偏好。幼年和青少年受试对象的偏侧化程度低于成年受试对象。所有受试对象主要用食指取出花生酱。与幼年受试对象相比，成年和青少年受试对象使用食指的频率更高。结果表明，协调双手任务（a）在个体层面引发强烈的用手偏好，（b）在群体层面引发右利手现象。