Cai Ming Bo, Eagleman David M, Ma Wei Ji
J Vis. 2015;15(13):19. doi: 10.1167/15.13.19.
A repeated stimulus is judged as briefer than a novel one. It has been suggested that this duration illusion is an example of a more general phenomenon-namely that a more expected stimulus is judged as briefer than a less expected one. To test this hypothesis, we manipulated high-level expectation through the probability of a stimulus sequence, through the regularity of the preceding stimuli in a sequence, or through whether a stimulus violates an overlearned sequence. We found that perceived duration is not reduced by these types of expectation. Repetition of stimuli, on the other hand, consistently reduces perceived duration across our experiments. In addition, the effect of stimulus repetition is constrained to the location of the repeated stimulus. Our findings suggest that estimates of subsecond duration are largely the result of low-level sensory processing.
重复刺激被判断为比新刺激持续时间更短。有人认为，这种持续时间错觉是一种更普遍现象的例证，即更可预期的刺激被判断为比预期性较低的刺激持续时间更短。为了验证这一假设，我们通过刺激序列的概率、序列中先前刺激的规律性或刺激是否违反过度学习的序列来操纵高级预期。我们发现，这些类型的预期并不会缩短感知到的持续时间。另一方面，在我们的实验中，刺激的重复始终会缩短感知到的持续时间。此外，刺激重复的效果仅限于重复刺激的位置。我们的研究结果表明，亚秒级持续时间的估计很大程度上是低水平感觉加工的结果。
