Deparment of Psychology, TAMU-2435, Texas A&M University, College Station, TX 77845, USA.
Horm Behav. 2009 Nov;56(5):498-502. doi: 10.1016/j.yhbeh.2009.08.003. Epub 2009 Aug 19.
The physiological significance of hormonal changes in early postnatal life is emerging, but the behavioral significance in humans is unknown. As a first test of the relationship between hormones and behavior in early infancy we measured digit ratios and salivary hormone levels in forty-one male and female infants (3-4 months of age) who watched a video depicting stimuli differentially preferred by older males and females (toys, groups). An eye-tracker measured visual fixations and looking times. In female infants, hormones were unrelated to visual preferences. In male infants, higher androgen levels predicted stronger preferences for male-typical stimuli. These data provide the first evidence for a role for hormones in emerging sex-linked behavior in early development.
新生儿期激素变化的生理意义正在显现，但在人类中的行为意义尚不清楚。作为对婴儿早期激素与行为关系的首次测试，我们测量了 41 名男婴和女婴（3-4 个月大）的指长比和唾液激素水平，他们观看了一段视频，视频描绘了年长男性和女性（玩具、群体）不同偏好的刺激物。一个眼动追踪器测量了视觉注视和注视时间。在女婴中，激素与视觉偏好无关。在男婴中，较高的雄激素水平预示着对男性典型刺激物的偏好更强。这些数据首次为激素在早期发育中出现的与性别相关的行为中的作用提供了证据。
