Department of Psychology.
J Pers Soc Psychol. 2019 Jan;116(1):15-32. doi: 10.1037/pspa0000141.
To address ongoing debates about whether feelings of disgust are causally related to moral judgments, we pharmacologically inhibited spontaneous disgust responses to moral infractions and examined effects on moral thinking. Findings demonstrated, first, that the antiemetic ginger (Zingiber officinale), known to inhibit nausea, reduces feelings of disgust toward nonmoral purity-offending stimuli (e.g., bodily fluids), providing the first experimental evidence that disgust is causally rooted in physiological nausea (Study 1). Second, this same physiological experience was causally related to moral thinking: ginger reduced the severity of judgments toward purity-based moral violations (Studies 2 and 4) or eliminated the tendency for people higher in bodily sensation awareness to make harsher moral judgments than those low in this dispositional tendency (Study 3). In all studies, effects were restricted to moderately severe purity-offending stimuli, consistent with preregistered predictions. Together, findings provide the first evidence that psychological disgust can be disrupted by an antiemetic and that doing so has consequences for moral judgments. (PsycINFO Database Record (c) 2018 APA, all rights reserved).
为了解决关于厌恶感是否与道德判断有因果关系的持续争论，我们用药物抑制了对道德违规的自发厌恶反应，并研究了这种反应对道德思维的影响。研究结果表明，首先，止吐药姜（Zingiber officinale），已知能抑制恶心，减少对非道德纯洁性违规刺激物（如体液）的厌恶感，这为厌恶感是由生理上的恶心引起的这一假设提供了首个实验证据（研究 1）。其次，这种相同的生理体验与道德思维有关：姜减少了对基于纯洁性的道德违规的判断的严重性（研究 2 和 4），或者消除了身体感觉意识较高的人比这种倾向较低的人做出更严厉的道德判断的倾向（研究 3）。在所有研究中，这种影响都仅限于中度严重的纯洁性违规刺激物，这与预先注册的预测一致。总之，这些发现首次证明了心理厌恶感可以被止吐药阻断，而且这种阻断会对道德判断产生影响。（APA，2018，所有权利保留）。
