Rahman Qazi, Wilson Glenn D, Abrahams Sharon
Department of Psychology, Institute of Psychiatry, University of London, London, United Kingdom.
Behav Neurosci. 2004 Feb;118(1):243-7. doi: 10.1037/0735-7044.118.1.243.
Little is known about the neurodevelopmental nature of human cognitive abilities. This investigation presents evidence consistent with a hypothesis that interindividual and within-sex cognitive variations are associated with vulnerabilities to environmental sources of developmental stress. A large sample of healthy heterosexual and homosexual men and women (N=240) completed a series of visuospatial and verbal tests. A composite fluctuating asymmetry (FA) measure was computed from the lengths of the finger digits. In heterosexual men, higher FA scores were associated with poorer line orientation judgment; and in homosexual men, with poorer verbal fluency and perceptual speed. No associations were found in heterosexual or homosexual women. These results suggest that developmental instability is linked to neurocognitive integrity in men, but not in women.
关于人类认知能力的神经发育本质，我们所知甚少。本研究提供的证据与一种假设相符，即个体间和性别内的认知差异与发育应激的环境来源易感性相关。一大群健康的异性恋和同性恋男性及女性（N = 240）完成了一系列视觉空间和语言测试。根据手指长度计算出综合波动不对称性（FA）指标。在异性恋男性中，较高的FA得分与较差的线条方向判断能力相关；在同性恋男性中，则与较差的语言流畅性和感知速度相关。在异性恋或同性恋女性中未发现相关性。这些结果表明，发育不稳定性与男性的神经认知完整性相关，但与女性无关。
