PDF(Pubmed)
Abstract：
The biases affecting people\'s perception of dynamic stimuli are typically robust and strong for specific stimulus configurations. For example, representational momentum describes a systematic perceptual bias in the direction of motion for the final location of a moving stimulus. Under clearly defined stimulus configurations (e.g., specific stimulus identity, size, speed), for example, the frequently used \"implied motion\" trial sequence, for which a target is subsequently presented in a consistent direction and with a consistent speed, a displacement in motion direction is evidenced. The present study explores the potential influence of expectations regarding directional as well as speed consistencies on representational momentum, elicited by including other, inconsistently moving trial types within the same experimental block. A systematic representational momentum effect was observed when only consistent motion trials were presented. In contrast, when inconsistent target motion trials were mixed within the same block of experimental trials, the representational momentum effect decreased, or was even eliminated (Experiments 1 & 2). Detailed analysis indicated that this reflects a global (proportion of consistent and inconsistent motion trials within a particular experimental block), not local (preceding trial influencing actual trial) effect. Yet, additional follow-up studies (Experiments 3 & 4) support the idea that these changes in perceived location are strongly influenced by the overall stimulus speed statistics in the different experimental blocks. These results are discussed and interpreted in light of recent theoretical developments in the literature on motion perception that highlight the importance of expectations about stimulus speed for motion perception.
摘要：
对于特定的刺激配置，影响人们对动态刺激感知的偏见通常是稳健和强烈的。例如,代表性动量描述了在运动刺激的最终位置的运动方向上的系统感知偏差。在明确定义的刺激配置下(例如，特定的刺激身份，尺寸,speed),例如,经常使用的“隐含运动”试验序列，目标随后以一致的方向和一致的速度呈现，在运动方向上的位移被证明。本研究探讨了预期对方向和速度一致性对代表性动量的潜在影响，通过包括其他，在同一实验块内不一致地移动试验类型。当仅进行一致的运动试验时，观察到系统的代表性动量效应。相比之下,当不一致的目标运动试验在同一块实验试验中混合时，代表性动量效应下降，或甚至被淘汰（实验1和2）。详细分析表明，这反映了一个全球性的（在一个特定的实验块内一致和不一致的运动试验的比例），非局部(前一试验影响实际试验)效应。然而，其他后续研究（实验3和4）支持以下观点：感知位置的这些变化受到不同实验块中整体刺激速度统计的强烈影响。根据运动感知文献中的最新理论发展，对这些结果进行了讨论和解释，这些发展凸显了对运动感知的刺激速度的期望的重要性。
