Oswald Kaitlin, Bo Jin
a Department of Psychology , Eastern Michigan University , Ypsilanti , MI.
b Department of Psychiatry and Human Behavior , University of Mississippi Medical Center , Jackson , MS.
J Mot Behav. 2019;51(2):161-170. doi: 10.1080/00222895.2018.1443906. Epub 2018 Mar 13.
Bimanual coordination is an essential human function requiring efficient interhemispheric communication to produce coordinated movements. Previous research suggests a "bimanual advantage" phenomenon, where completing synchronized bimanual tasks results in less variability than unimanual tasks. Additionally, of hand dominance has been shown to influence coordinated performance. The present study examined the bimanual advantage in individuals with consistent and inconsistent handedness. It was predicted that participants with consistent handedness would not display a bimanual advantage unlike those with inconsistent handedness. Fifty-six young adults completed a finger-tapping paradigm in five conditions: unimanual tapping with either left or right hand, in-phase bimanual tapping, and out-of phase bimanual tapping led by either left or right hand. Results were not consistent with the hypothesis that participants with consistent handedness displayed the "bimanual advantage". However, the "bimanual advantage" was not evident for the inconsistent handers when the temporal consistency was measured with either the left or right hand only. Overall, the "bimanual advantage" may be dependent upon consistency of hand preference, as well as the direction of hand dominance.
双手协调是一项基本的人类功能，需要高效的半球间通信来产生协调的动作。先前的研究表明存在“双手优势”现象，即完成同步双手任务时的变异性比单手任务小。此外，已证明用手习惯会影响协调表现。本研究考察了用手习惯一致和不一致的个体的双手优势。据预测，与用手习惯不一致的参与者不同，用手习惯一致的参与者不会表现出双手优势。56名年轻人在五种条件下完成了手指敲击范式：用左手或右手进行单手敲击、同相双手敲击以及由左手或右手主导的异相双手敲击。结果与用手习惯一致的参与者表现出“双手优势”这一假设不一致。然而，当仅用左手或右手测量时间一致性时，用手习惯不一致的参与者的“双手优势”并不明显。总体而言，“双手优势”可能取决于用手偏好的一致性以及用手习惯的方向。
