Tan U, Akgün A, Telatar M
Atatürk University, Medical Faculty, Department of Physiology, Erzurum, Turkey.
Int J Neurosci. 1993 Jul-Aug;71(1-4):21-8. doi: 10.3109/00207459309000588.
The relationships among nonverbal intelligence, hand speed, and serum testosterone level were studied in male left-handers ranging in age from 17 to 19 years. Hand speed was measured by a peg moving task. To assess the differences between nonverbal IQs. Cattell's Culture Fair Intelligence Test was used. There was a direct correlation between IQ and testosterone. IQ increased linearly with right-hand speed, which was directly related to testosterone. There was no significant correlation between IQ and left-hand speed, which was not significantly correlated with testosterone. IQ decreased with left- minus right-hand speed, which also decreased with testosterone. It was suggested that nonverbal spatial reasoning ability may be directly associated with the efficiency of left brain, which is favored by testosterone in male left-handers. It was also concluded that the left to right asymmetry in hand speed may depend on efficiency of the right brain in left-handed males.
对年龄在17至19岁之间的男性左利手者的非言语智力、手部速度和血清睾酮水平之间的关系进行了研究。通过插栓移动任务来测量手部速度。为评估非言语智商之间的差异，使用了卡特尔文化公平智力测验。智商与睾酮之间存在直接相关性。智商随右手速度呈线性增加，而右手速度与睾酮直接相关。智商与左手速度之间无显著相关性，左手速度与睾酮也无显著相关性。智商随左手减去右手的速度下降，而该速度也随睾酮下降。研究表明，非言语空间推理能力可能与左脑效率直接相关，而在男性左利手者中，睾酮有利于左脑效率。研究还得出结论，左手者手部速度的左右不对称可能取决于右脑在左利手男性中的效率。
