van Strien J W, Bouma A
Faculty of Psychology, Free University, Amsterdam, The Netherlands.
J Clin Exp Neuropsychol. 1988 Mar;10(2):139-56. doi: 10.1080/01688638808408231.
Two experiments were conducted to study the interference effects of different concurrent verbal tasks on unimanual single-finger tapping and unimanual sequential finger tapping. Experiment 1 involved 24 right-handed university students. In the dual-task conditions, right-handers showed a greater right-hand than left-hand performance reduction for single-finger tapping, and an equal right-hand and left-hand reduction for sequential tapping. Experiment 2 involved 60 left-handed university students, divided into four groups according to familial sinistrality and writing hand posture. In the dual-task conditions, left-handers showed a greater left-hand than right-hand performance reduction for single-finger tapping, and an equal left-hand and right-hand reduction for sequential finger tapping. A dichotic listening task revealed a left hemispheric dominance for auditory linguistic functioning in most of the left-handers. Familial sinistrality and hand posture, on the whole, did not influence tapping performances. However, these factors influenced the ear asymmetries on the dichotic listening task. It is speculated that, with single-finger tapping, interference only takes place beyond the point of language motor programming, that is to say, at the motor areas and the supplementary motor areas of the cortex.
进行了两项实验，以研究不同的并发言语任务对单手单指敲击和单手顺序手指敲击的干扰效应。实验1涉及24名右利手大学生。在双任务条件下，右利手在单指敲击时右手表现比左手下降得更多，而在顺序敲击时右手和左手下降程度相同。实验2涉及60名左利手大学生，根据家族性左利手和书写手姿势分为四组。在双任务条件下，左利手在单指敲击时左手表现比右手下降得更多，而在顺序手指敲击时左手和右手下降程度相同。一项双耳分听任务显示，大多数左利手在听觉语言功能方面存在左半球优势。总体而言，家族性左利手和手姿势并不影响敲击表现。然而，这些因素影响了双耳分听任务中的耳不对称性。据推测，对于单指敲击，干扰仅发生在语言运动编程点之后，也就是说，在皮层的运动区和辅助运动区。
