They proved the existence of mental rotation with RT and error rate by the means of behavioural study. 他们主要采用行为学研究方法，通过反应时和错误率证明了心理旋转的存在。
Federal investigators have found a significant error rate because information in the database is sometimes inaccurate or outdated. 联邦调查员发现，由于数据库中偶尔的信息错误或过期会产生很高错误率。
