Research Centre in the Psychology of Cognition, Language, and Emotion, PsyCLE, Aix-Marseille University, 29 Av. Schuman 13621, Aix-en-Provence Cedex 1, France.
Dev Psychobiol. 2013 Sep;55(6):651-61. doi: 10.1002/dev.21128. Epub 2013 Jul 12.
Olive baboons (Papio anubis) do acquire and use intentional requesting gestures in experimental contexts. Individual's hand preference for these gestures is consistent with that observed for typical communicative gestures, but not for manipulative actions. Here, we examine whether the strength of hand preference may also be a good marker of hemispheric specialization for communicative gestures, hence differing from the strength of hand preference for manipulative actions. We compared the consistency of individuals' hand preference with regard to the variation in space of either (i) a communicative partner or (ii) a food item to grasp using a controlled set-up. We report more consistent hand preference for communicative gestures than for grasping actions. Established hand preference in the midline was stronger for gesturing than for grasping and allowed to predict the consistency of hand preference across positions. We found no significant relation between the direction of hand preference and the task.
非洲狒狒（Papio anubis）确实会在实验环境中习得并使用有意的请求手势。个体对手势的偏好与观察到的典型交际手势一致，但与操纵动作不一致。在这里，我们研究了手的偏好强度是否也可以作为交际手势半球专门化的良好指标，因此与操纵动作的手的偏好强度不同。我们比较了个体对手的偏好的一致性，以了解（i）交际伙伴或（ii）要使用受控设置抓住的食物的空间变化。我们报告说，对于交际手势，个体的手的偏好一致性比抓取动作更强。在中线建立的手势偏好强于抓取，并且可以预测手的偏好在不同位置的一致性。我们没有发现手的偏好方向与任务之间存在显著关系。
