ABSTRACT

Studies have highlighted an association between motor laterality and speech production laterality. It is thought that common demands for sequential processing may underlie this association. However, most studies in this area have relied on relatively small samples and have infrequently explored the reliability of the tools used to assess lateralization. We, therefore, established the validity and reliability of an online battery measuring sequence-based motor laterality and language laterality before exploring the associations between laterality indices on language and motor tasks. The online battery was completed by 621 participants, 52 of whom returned to complete the battery a second time. The three motor tasks included in the battery showed good between-session reliability (r ≥ .78) and were lateralized in concordance with hand preference. The novel measure of speech production laterality was left lateralized at population level as predicted, but reliability was less satisfactory (r = .62). We found no evidence of an association between sequence-based motor laterality and language laterality. Those with a left-hand preference were more strongly lateralized on motor tasks requiring midline crossing; this effect was not observed in right-handers. We conclude that there is little evidence of the co-lateralization of language and sequence-based motor skill on this battery.

摘要

研究强调了运动偏侧和言语产生偏侧之间的关联。人们认为对顺序处理的共同需求可能是这种关联的基础。然而，该领域的大多数研究都依赖于相对较小的样本，并且很少探索用于评估偏侧化的工具的可靠性。因此，在探索语言和运动任务的偏侧指数之间的关联之前，我们确定了在线电池测量基于序列的运动偏侧和语言偏侧的有效性和可靠性。在线电池测试由 621 名参与者完成，其中 52 人再次返回完成电池测试。电池中包含的三个运动任务显示出良好的会话间可靠性（r  ≥ .78) 并根据手的偏好进行侧化。正如预测的那样，言语产生偏侧性的新措施在人口水平上偏左，但可靠性不太令人满意 ( r  = .62)。我们没有发现基于序列的运动偏侧和语言偏侧之间关联的证据。那些偏向左手的人在需要穿过中线的运动任务上更偏向于一侧；在右撇子中没有观察到这种效果。我们得出的结论是，几乎没有证据表明语言和基于序列的运动技能在该电池上的共侧化。