Parkosadze Khatuna, Otto Thomas U, Malania Maka, Kezeli Archil, Herzog Michael H
Laboratory of Vision Physiology, I. Beritashvili Institute of Physiology, Tbilisi, Georgia.
J Vis. 2008 Jan 11;8(1):5.1-8. doi: 10.1167/8.1.5.
In perceptual learning, performance often improves within a short time if only one stimulus variant is presented, such as a line bisection stimulus with one outer-line-distance. However, performance stagnates if two bisection stimuli with two outer-line-distances are presented randomly interleaved. Recently, S. G. Kuai, J. Y. Zhang, S. A. Klein, D. M. Levi, and C. Yu, (2005) proposed that learning under roving conditions is impossible in general. Contrary to this proposition, we show here that perceptual learning with bisection stimuli under roving is possible with extensive training of 18000 trials. Despite this extensive training, the improvement of performance is still largely specific. Furthermore, this improvement of performance cannot be explained by an accommodation to stimulus uncertainty caused by roving.
在知觉学习中，如果只呈现一种刺激变体，比如具有一种外线距离的线段二等分刺激，那么在短时间内表现通常会提高。然而，如果随机交错呈现两种具有不同外线距离的二等分刺激，表现就会停滞不前。最近，S.G. 蒯、J.Y. 张、S.A. 克莱因、D.M. 利维以及C. 于（2005年）提出，一般来说在变化条件下学习是不可能的。与这一观点相反，我们在此表明，通过18000次试验的大量训练，在变化条件下使用二等分刺激进行知觉学习是可能的。尽管有这种大量训练，表现的提高在很大程度上仍然是特定的。此外，表现的这种提高不能用对由变化引起的刺激不确定性的适应来解释。
