Han Sihang, Hamm Jeff P
School of Psychology, The University of Auckland, Auckland, New Zealand.
Atten Percept Psychophys. 2018 May;80(4):951-970. doi: 10.3758/s13414-018-1482-2.
Illusory line motion (ILM) refers to perception of motion in a bar that onsets or offsets all at once. When the bar onsets or offsets between two boxes after one of the boxes flashes, the bar appears to shoot out of the flashed box (ILM). If the bar offsets during the flash, it appears to contract into the flashed box (reverse ILM; rILM). Onset bars do not show rILM. Moreover, rILM and ILM are not correlated, indicating they are two different illusions. To date, rILM has only been studied using a 50-ms flash where the bar offsets 16.7 ms after flash onset. It is not clear if rILM is due to the 16.7-ms flash-bar-removal stimulus onset asynchrony (SOA) or due to the flash offsetting after the bar. The current studies explore these parameters to better understand the conditions that lead to rILM. The results suggest that ILM is sensitive to the temporal interval between flash onset and bar offset, while rILM appears to arise when the flash offsets after the bar has been removed regardless of the temporal interval between flash onset and bar removal. These results are consistent with ILM reflecting visual exogenous attention while rILM may reflect the low-level spreading of subthreshold activation radiating from the flashed box. The findings are incorporated into the recent work that suggests that the literature concerning ILM is possibly conflating a number of different illusions of line motion, including polarized gamma motion (PGM), transformational apparent motion (TAM), and exogenous attention induced motion (ILM).
虚幻线条运动（ILM）是指对一条同时出现或消失的线条产生的运动感知。当一个方块闪烁后，线条在两个方块之间出现或消失时，线条似乎从闪烁的方块中射出（ILM）。如果线条在闪烁期间消失，它似乎会收缩进闪烁的方块中（反向ILM；rILM）。出现的线条不会表现出rILM。此外，rILM和ILM不相关，这表明它们是两种不同的错觉。迄今为止，rILM仅在使用50毫秒闪烁的情况下进行过研究，其中线条在闪烁开始后16.7毫秒消失。目前尚不清楚rILM是由于16.7毫秒的闪烁-线条移除刺激起始异步（SOA），还是由于线条消失后闪烁才结束。当前的研究探讨了这些参数，以便更好地理解导致rILM的条件。结果表明，ILM对闪烁开始和线条消失之间的时间间隔敏感，而rILM似乎是在线条被移除后闪烁才结束时出现，无论闪烁开始和线条移除之间的时间间隔如何。这些结果与ILM反映视觉外源性注意一致，而rILM可能反映了从闪烁方块辐射出的阈下激活的低水平扩散。这些发现被纳入了最近的研究工作中，该研究表明关于ILM的文献可能混淆了许多不同的线条运动错觉，包括极化伽马运动（PGM）、变换性表观运动（TAM）和外源性注意诱导运动（ILM）。
