Perceptual learning of motion direction discrimination in fovea: separable mechanisms

Vision Research
Zhong-Lin LuBarbara Anne Dosher

Abstract

Dosher and Lu (1998) [Perceptual learning reflects external noise filtering and internal noise reduction through channel reweighting. Proceedings of the National Academy of Sciences of the United States of America, 95 (23), 13988-13993.] proposed three mechanisms of perceptual learning: stimulus enhancement, external noise exclusion, and multiplicative noise reduction. In this study, we used pre-training as a manipulation to evaluate the separability of these mechanisms as a key test of the theoretical framework. Observers were trained in identifying the motion direction of a moving sine-wave grating in fovea with varying amount of superimposed external noise across trials, after receiving no pre-training, pre-training in high external noise, or pre-training in zero external noise in the same task. We found: (1) Without pre-training, perceptual learning significantly reduced contrast thresholds by about the same amount across all the external noise levels. (2) Both types of pre-training significantly reduced contrast thresholds in the corresponding conditions. (3) Pre-training in high external noise greatly reduced subsequent learning in high external noise, accounting for 64.6% of the total (pre-training + subsequent) improvem...Continue Reading

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Citations

Sep 28, 2010·Neurobiology of Learning and Memory·Zhong-Lin LuBarbara Anne Dosher
Jan 31, 2013·Scientific Reports·Andrew T AstlePaul V McGraw
May 7, 2010·Learning & Perception·Zhong-Lin Lu, Barbara Anne Dosher
Aug 3, 2011·Vision Research·Jeffrey D Bower, George J Andersen
Sep 8, 2009·Vision Research·Zhong-Lin LuBarbara Anne Dosher
Nov 19, 2014·Frontiers in Psychology·Zahra HussainPaul V McGraw
Jul 31, 2013·Proceedings of the National Academy of Sciences of the United States of America·Barbara Anne DosherZhong-Lin Lu
Jun 20, 2007·Psychological Science·Barbara Anne Dosher, Zhong-Lin Lu
Apr 4, 2019·Journal of Vision·Jutta Billino, Karin S Pilz
Nov 23, 2019·Journal of Vision·Jeroen J A van Boxtel
Jul 21, 2017·Annual Review of Vision Science·Barbara Dosher, Zhong-Lin Lu
Oct 16, 2021·Communications Biology·Ru-Yuan ZhangDaphne Bavelier

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