Authors:
Barbara Anne Dosher Department of Cognitive Sciences, University of California, Irvine, CA, USA
Department of Cognitive Sciences, Center for Cognitive Neuroscience, Institute for Mathematical Behavioral Sciences, Center for Neurobiology of Learning and Memory, University of California, Irvine, CA, 92697, USA

Search for other papers by Barbara Anne Dosher in
Current site
Google Scholar
PubMed
Close
and
Zhong-Lin Lu Departments of Psychology and Biomedical Engineering, and Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, USA

Search for other papers by Zhong-Lin Lu in
Current site
Google Scholar
PubMed
Close
Restricted access

Abstract

Perceptual learning is the improvement in perceptual task performance with practice or training. The observation of specificity in perceptual learning has been widely associated with plasticity in early visual cortex representations. Here, we review the evidence supporting the plastic reweighting of readout from stable sensory representations, originally proposed by Dosher and Lu (1998), as an alternative explanation of perceptual learning. A task-analysis that identifies circumstances in which specificity supports representation enhancement and those in which it implies reweighting provides a framework for evaluating the literature; reweighting is broadly consistent with the behavioral results and almost all of the physiological reports. We also consider the evidence that the primary mode of perceptual learning is through augmented Hebbian learning of the reweighted associations, which has implications for the role and importance of feedback. Feedback is not necessary for perceptual learning, but can improve it in some circumstances, and in some cases block feedback is also helpful — all effects that are generally compatible with an augmented Hebbian model (Petrov, Dosher and Lu, 2005). The two principles of perceptual learning through reweighting evidence from stable sensory representations and of augmented Hebbian learning provide a theoretical structure for the consideration of issues such as task difficulty, task roving, and cuing in perceptual learning.

  • Collapse
  • Expand

Learning & Perception
Language English
Size  
Year of
Foundation
2009
Publication
Programme
ceased
Volumes
per Year
 
Issues
per Year
 
Publisher Akadémiai Kiadó
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1789-3186 (Print)
ISSN 2060-9175 (Online)

Monthly Content Usage

Abstract Views Full Text Views PDF Downloads
Jan 2024 53 3 0
Feb 2024 19 0 0
Mar 2024 40 0 0
Apr 2024 16 0 0
May 2024 13 0 0
Jun 2024 16 0 0
Jul 2024 0 0 0