University of Auckland, Auckland, New Zealand 1142.
Mem Cognit. 2010 Mar;38(2):206-20. doi: 10.3758/MC.38.2.206.
Rotated mirror/normal letter discriminations are thought to require mental rotation in order to determine the direction of facing of the stimulus. The response time (RT) function over orientation tends to be curved, rather than the linear function found for other mental rotation tasks. The present study investigated the possibility that the curved RT function is a result of a mixture of trials requiring and not requiring mental rotation. The results suggested that the frequency of mental rotation is also a linear function of stimulus orientation. Moreover, the relationship between an individual's rate of plane rotation and the mean difference in RT between mirror and normal stimuli was replicated, supporting the suggestion that mirrored stimuli are flipped after they are spun (Hamm, Johnson, & Corballis, 2004). On the basis of the present findings, the entire RT function can be modeled by using only the mean RTs for upright and inverted stimuli.
旋转镜像/正常字母的辨别被认为需要心理旋转才能确定刺激的朝向。反应时间（RT）函数随方向的变化往往是曲线的，而不是其他心理旋转任务中发现的线性函数。本研究探讨了曲线 RT 函数是否是需要和不需要心理旋转的混合试验的结果。结果表明，心理旋转的频率也是刺激方向的线性函数。此外，个体的平面旋转率与镜像和正常刺激之间的平均 RT 差异之间的关系得到了复制，支持了镜像刺激在旋转后被翻转的观点（Hamm、Johnson 和 Corballis，2004）。基于目前的发现，仅使用直立和倒置刺激的平均 RT 就可以对整个 RT 函数进行建模。
