“经济学人”最近发表了一篇有关压力的令人惊讶的研究结果的文章。 与流行的观点相反，压力并不总是很糟糕，压力也不重要。 相反，影响绩效和健康的关键决定因素主要是心理因素。 在一项研究中，研究人员将一组GRE考试分为两组。 采取唾液样本为所有参与者建立基线压力水平。 然后有一个小组被告知，在练习考试中的压力是自然的，可以提高表现，而另一个小组只是参加了考试。 唾液样本在考试结束时进行，两组的结果都表明了相似的压力水平。 但是，那些已经学习过压力的团队在实践测试（以及几个月后，在实际的GRE）上得分高于刚参加测试的人。
The Economist recently published an article with some surprising research findings about stress. Contrary to popular belief, stress is not always bad, nor is it the amount of stress that matters. Rather, the key determinant of its impact on performance and health is largely psychological. In one study, researchers divided a set of GRE test takers into two groups. Saliva samples were taken to establish baseline stress levels for all participants. Then one group was told that stress during practice exams is natural and can improve performance, while the other group just took the test. Saliva samples were taken at the end of the exam, and the results from both groups indicated similar levels of stress. BUT, the group that had learned stress can be helpful scored higher on the practice test (and, several months later, on the actual GRE) than those who just took the test.