Gadea M, Gómez C, González-Bono E, Salvador A, Espert R
Facultad de Psicología, Area de Psicobiología, Universitat de València, Avda. Blasco Ibañez 21, Spain.
Psychoneuroendocrinology. 2003 Apr;28(3):274-87. doi: 10.1016/s0306-4530(02)00020-3.
The aim of this study was to test the hypothesis that individual differences in testosterone (T) are associated with different patterns of linguistic lateralization and hand preference. Twenty left-handed (LH) and 19 right-handed (RH) women filled in a handedness questionnaire and performed a consonant-vowel dichotic listening test (DL-CV). Salivary T was measured by radioimmunoassay (RIA). LH women showed significantly lower mean salivary T than RH women. T levels were negatively correlated with the absolute value of the DL laterality index. Subjects with right ear advantage (REA) were classified into strongly and weakly lateralized following Wexler et al. method (Brain Lang. 13 (1981) 13). When taking into account hand preference, a pattern emerged in that RH-strongly lateralized and LH-weakly lateralized women showed similar T levels. The lowest level appeared for LH-strongly lateralized women and the highest for RH-weakly lateralized women, being significantly different from each other. The results are discussed in terms of several theories that have proposed a link between testosterone and cerebral lateralization.
本研究的目的是检验睾酮（T）的个体差异与语言侧化和利手偏好的不同模式相关这一假设。20名左利手（LH）和19名右利手（RH）女性填写了利手问卷，并进行了辅音-元音双耳分听测试（DL-CV）。通过放射免疫分析（RIA）测定唾液T水平。LH女性的平均唾液T水平显著低于RH女性。T水平与DL侧化指数的绝对值呈负相关。根据韦克斯勒等人的方法（《大脑与语言》13卷（1981年）第13页），右耳优势（REA）的受试者被分为强侧化和弱侧化。考虑到利手偏好时，出现了一种模式，即RH强侧化和LH弱侧化的女性显示出相似的T水平。LH强侧化女性的T水平最低，RH弱侧化女性的T水平最高，两者之间存在显著差异。根据提出睾酮与大脑侧化之间联系的几种理论对结果进行了讨论。
