ABSTRACT

The current research compared hand selection in a preferential reaching paradigm with unimanual (i.e., pick-up cup) and bimanual (pick-up cup and pour from pitcher) tasks. In addition, relationships between self-report, questionnaire-based hand preference (unimanual and bimanual) and patterns of hand selection were assessed. Data offer support for a division of labour between the hands in at the midline; however, bimanual selection otherwise reflects consideration of object proximity (i.e., location) and comfort (i.e., biomechanical constraints). When grasping cups in right space, the right-hand was used to stabilize the cup and left-hand to mobilize the pitcher, whereas the opposite pattern was observed in left-space. Unimanual hand selection was also driven by object location. Subsequent analyses revealed a relationship between unimanual measures, but not bimanual measures of hand preference. Overall, findings support the notion that questionnaire data are associated with hand preference for grasping to a certain extent; however, use of a comprehensive battery of assessments is recommended when assessing and/or predicting handedness.

摘要

目前的研究将优先到达范式中的手选择与单手（即拿起杯子）和双手（拿起杯子并从投手倒）任务进行比较。此外，评估了自我报告、基于问卷的手部偏好（单手和双手）和手选择模式之间的关系。数据为中线手之间的分工提供支持；然而，双手选择在其他方面反映了对物体接近度（即位置）和舒适度（即生物力学约束）的考虑。在右侧空间抓杯子时，右手用于稳定杯子，左手用于移动投手，而在左侧空间中观察到相反的模式。单手选择也是由对象位置驱动的。随后的分析揭示了单手测量之间的关系，而不是手偏好的双手测量之间的关系。总体而言，调查结果支持问卷数据在一定程度上与手的抓握偏好相关的观点。但是，在评估和/或预测左右手习惯时，建议使用全面的评估组合。