Blois-Heulin C, Bernard V, Bec P
Station biologique, University of Rennes, Centre National de la Recherche Scientifique, Paimpoint, France.
J Comp Psychol. 2007 May;121(2):205-13. doi: 10.1037/0735-7036.121.2.205.
The authors examined the effects of task complexity and posture on laterality and compared lateralization during different tasks in 9 captive grey-cheeked mangabeys (Lophocebus albigena) during spontaneous food processing and 3 experimental tasks. Comparisons with data of red-capped mangabeys (Cercocebus torquatus torquatus; semiterrestrial species) were used. Less than half the monkeys were lateralized for simple everyday activities, but 6 were lateralized for complex daily activities. Moreover, all the monkeys were lateralized when performing experimental tasks. Laterality at the group level was found for the bipedal task: Mangabeys were right-handed. Complexity of tasks increases laterality at the individual level. Significant differences between the 2 species of mangabeys were found, allowing us to confirm that postural constraints are a major factor in the emergence of group handedness.
作者研究了任务复杂性和姿势对偏侧性的影响，并比较了9只圈养灰颊白眉猴（Lophocebus albigena）在自发食物处理和3项实验任务的不同任务期间的偏侧化情况。研究还使用了与红顶白眉猴（Cercocebus torquatus torquatus；半地栖物种）的数据进行比较。不到一半的猴子在简单日常活动中表现出偏侧化，但有6只在复杂日常活动中表现出偏侧化。此外，所有猴子在执行实验任务时都表现出偏侧化。在双足任务中发现了群体水平的偏侧性：白眉猴是右利手。任务的复杂性在个体水平上增加了偏侧性。在两种白眉猴之间发现了显著差异，这使我们能够确认姿势限制是群体利手出现的一个主要因素。
