• Publications
  • Influence
Where practice makes perfect in texture discrimination: evidence for primary visual cortex plasticity.
  • A. Karni, D. Sagi
  • Biology, Psychology
    Proceedings of the National Academy of Sciences…
  • 1 June 1991
TLDR
This work reports remarkable long-term learning in a simple texture discrimination task where learning is specific for retinal input and suggests that learning involves experience-dependent changes at a level of the visual system where monocularity and the retinotopic organization of thevisual input are still retained and where different orientations are processed separately.
The time course of learning a visual skill
TLDR
Here it is conjecture that some types of perceptual experience trigger permanent neural changes in early processing stages of the adult visual system, which may take many hours to become functional.
Motion-induced blindness in normal observers
TLDR
It is shown that this motion-induced blindness (MIB) phenomenon is unlikely to reflect retinal suppression, sensory masking or adaptation, and might reflect a disruption of attentional processing, which shifts the system into a winner-takes-all mode.
Dependence on REM sleep of overnight improvement of a perceptual skill.
TLDR
Performance of a basic visual discrimination task improved after a normal night's sleep, indicating that a process of human memory consolidation, active during sleep, is strongly dependent on REM sleep.
Improving vision in adult amblyopia by perceptual learning.
TLDR
It is demonstrated that perceptual learning can improve basic representations within an adult visual system that did not develop during the critical period, and induction of low-level changes might yield significant perceptual benefits that transfer to higher visual tasks.
Perceptual learning in Vision Research
  • D. Sagi
  • Psychology, Biology
    Vision Research
  • 1 July 2011
Spatial interactions in human vision: from near to far via experience-dependent cascades of connections.
  • U. Polat, D. Sagi
  • Biology, Psychology
    Proceedings of the National Academy of Sciences…
  • 15 February 1994
TLDR
A plasticity in early vision governed by Hebbian-like rules is suggested, with learning induces an increase in the spatial range of lateral interactions and the induced longer-range facilitation is a result of internal response transmission via a cascade of local connections.
Gabor filters as texture discriminator
TLDR
The model was found to be in good correlation with known psychophysical characteristics as texton based texture segregation and micropattern density sensitivity, however, this simple model fails to predict human performance in discrimination tasks based on differences in the density of “terminators”.
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