PDF(Pubmed)
Abstract：
Representational momentum describes the typical overestimation of the final location of a moving stimulus in the direction of stimulus motion. While systematically observed in different sensory modalities, especially vision and audition, in touch, empirical findings indicate a mixed pattern of results, with some published studies suggesting the existence of the phenomenon, while others do not. In the present study, one possible moderating variable, the relative probabilities of different trial types, was explored in an attempt to resolve the seemingly contradictory findings in the literature. In some studies, only consistently moving target stimuli were presented and no representational momentum was observed, while other studies have included inconsistently moving target stimuli in the same experimental block, and observed representational momentum. Therefore, the present study was designed to systematically compare the localization of consistent target motion stimuli across two experimental blocks, for which either only consistent motion trials were presented, or else mixed with inconsistent target motion trials. The results indicate a strong influence of variations in the probability of different trial types on the occurrence of representational momentum. That is, representational momentum only occurred when both trial types (inconsistent and consistent target motion) were presented within one experimental block. The results are discussed in light of recent theoretical advancements in the literature, namely the speed prior account of motion perception.
摘要：
代表性动量描述了在刺激运动方向上移动刺激的最终位置的典型高估。虽然在不同的感觉模式下进行了系统观察，尤其是视觉和试镜，在触摸,实证结果表明结果是混合的，一些发表的研究表明这种现象的存在，而其他人没有。在本研究中,一个可能的调节变量，不同试验类型的相对概率，进行了探索，试图解决文献中看似矛盾的发现。在一些研究中,只呈现持续移动的目标刺激，没有观察到代表性的动量，虽然其他研究包括在同一实验块中不一致地移动目标刺激，并观察到代表性动量。因此,本研究旨在系统地比较两个实验块中一致目标运动刺激的定位，对于其中任何一个，只提出了一致的运动试验，或者混合不一致的目标运动试验。结果表明，不同试验类型的概率变化对代表性动量的发生有很大影响。也就是说,只有当两种试验类型(不一致和一致的目标运动)出现在一个实验块中时,才会出现代表性动量.根据文献中最近的理论进展对结果进行了讨论，即运动知觉的速度先验帐户。
