Contrary to the long-held belief of a close linkage between pupil dilation and attractiveness, we found an early and transient pupil constriction response when participants viewed an attractive face (and the effect of luminance/contrast is controlled). While human participants were making an attractiveness judgment on faces, their pupil constricted more for the more attractive (as-to-be-rated) faces. Further experiments showed that the effect of pupil constriction to attractiveness judgment extended to intrinsically esthetic visual objects such as natural scene images (as well as faces) but not to line-drawing geometric figures. When participants were asked to judge the roundness of faces, pupil constriction still correlated with their attractiveness but not the roundness rating score, indicating the automaticity of the pupil constriction to attractiveness. When pupillary responses were manipulated implicitly by relative background luminance changes (from the prestimulus screen), the facial attractiveness ratings were in accordance with the amount of pupil constriction, which could not be explained solely by simultaneous or sequential luminance contrast. The overall results suggest that pupil constriction not only reflects but, as a part of self-monitoring and attribution mechanisms, also possibly contributes to facial attractiveness implicitly.

与长期以来关于瞳孔扩张和吸引力之间密切联系的信念相反，我们发现当参与者看到一张有吸引力的脸时，瞳孔会出现早期和短暂的收缩反应（并且亮度/对比度的影响受到控制）。当人类参与者对面孔进行吸引力判断时，他们的瞳孔会因更具吸引力（待评估）的面孔而收缩得更多。进一步的实验表明，瞳孔收缩对吸引力判断的影响扩展到内在美感视觉对象，例如自然场景图像（以及面部），但不会扩展到线条绘制的几何图形。当参与者被要求判断面部的圆度时，瞳孔收缩仍然与他们的吸引力相关，但与圆度评分无关，表明瞳孔收缩对吸引力的自动性。当瞳孔反应被相对背景亮度变化（来自刺激前屏幕）隐式操纵时，面部吸引力评级与瞳孔收缩量一致，这不能仅用同时或连续的亮度对比来解释。总体结果表明，瞳孔收缩不仅反映，而且作为自我监控和归因机制的一部分，也可能隐含地促进面部吸引力。这不能仅用同时或顺序的亮度对比来解释。总体结果表明，瞳孔收缩不仅反映，而且作为自我监控和归因机制的一部分，也可能隐含地促进面部吸引力。这不能仅用同时或顺序的亮度对比来解释。总体结果表明，瞳孔收缩不仅反映，而且作为自我监控和归因机制的一部分，也可能隐含地促进面部吸引力。