University of Athens, Greece.
Laterality. 2010 Nov;15(6):597-609. doi: 10.1080/13576500903071104. Epub 2009 Jul 22.
Handedness is associated with cerebral organisation, but its relationship with cognition remains unclear. Since the Stroop task is believed to measure aspects of executive control, this study aims to investigate the effect of handedness on Stroop interference. We used the Stroop task with 90 young adults with university education, of whom 47 (23 males) were right-handed and 43 (21 males) were left-handed. Main dependent variables were Stroop baseline (SB), Stroop incongruent (SI), and the proportional derivative Stroop reduction (SR) [SR=(SB - SI)/SB×100%] (Bugg, Delosh, Davalos, & Davis, 2007; Graf, Uttl, &Tuokko, 1995) scores. The analysis revealed that SI is significantly affected by both handedness and the interaction of sex×handedness, whereas SR is only affected by handedness. After controlling for the effect of SB on SI, only the effect of handedness remained statistically significant [F(1, 83) = 6.44, p=.013]. Post-hoc comparisons showed that left-handed females performed significantly better than right-handed females on both SI (p=.003) and SR (p=.007). The data suggest that handedness is associated with cognitive function alterations, which lead to a smaller Stroop interference of left-handers irrespectively of sex, an effect that is more pronounced in the female subpopulation.
利手与大脑组织有关，但它与认知的关系仍不清楚。由于斯特鲁普任务被认为可以测量执行控制的某些方面，因此本研究旨在调查利手对斯特鲁普干扰的影响。我们使用斯特鲁普任务对 90 名具有大学教育背景的年轻人进行了测试，其中 47 名（23 名男性）为右利手，43 名（21 名男性）为左利手。主要的因变量是斯特鲁普基线（SB）、斯特鲁普不一致（SI）和比例导数斯特鲁普减少（SR）[SR=（SB-SI）/SB×100%]（Bugg、Delosh、Davalos 和 Davis，2007；Graf、Uttl 和 Tuokko，1995）分数。分析表明，SI 受到利手和性别×利手相互作用的显著影响，而 SR 仅受到利手的影响。在控制 SB 对 SI 的影响后，只有利手的影响仍具有统计学意义[F（1,83）=6.44，p=.013]。事后比较表明，左利手女性在 SI（p=.003）和 SR（p=.007）上的表现明显优于右利手女性。数据表明，利手与认知功能改变有关，这导致左利手的斯特鲁普干扰较小，而与性别无关，这种影响在女性亚群中更为明显。
