Even human faces and communication use red through the galvanic skin response, like when you blush or are stressed.

甚至人脸和交流时也通过皮肤电反应使用红色作为一种讯号，比如你害羞或压力大的时候。

To monitor what is going on Dr Rizzo's colleague Galen Buckwalter tracks physiological markers of stress, such as the reactions of participants' pupils to what their eyes are seeing, their electrocardiograms and their galvanic skin responses.

里兹的同事伽林·布克沃特博士负责对士兵压力状态下的生理指标进行跟踪监测。其中包括受试者观看图像时的瞳孔反应，心电图特征以及体表电流状况。