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View from the Top Hierarchies and Reverse Hierarchies in the Visual System
We propose that explicit vision advances in reverse hierarchical direction, as shown for perceptual learning. Processing along the feedforward hierarchy of areas, leading to increasingly complex… Expand
The reverse hierarchy theory of visual perceptual learning
Perceptual learning can be defined as practice-induced improvement in the ability to perform specific perceptual tasks. We previously proposed the Reverse Hierarchy Theory as a unifying concept that… Expand
Task difficulty and the specificity of perceptual learning
Practising simple visual tasks leads to a dramatic improvement in performing them. This learning is specific to the stimuli used for training. We show here that the degree of specificity depends on… Expand
Linear and nonlinear spatial subunits in Y cat retinal ganglion cells.
1. The mechanism which makes Y cells different from X cells was investigated. 2. Spatial frequency contrast sensitivity functions for the fundamental and second harmonic responses of Y cells to… Expand
Quantitative analysis of retinal ganglion cell classifications.
The classification of cat retinal ganglion cells as X or Y on the basis of linearity or nonlinearity of spatial summation has been confirmed and extended. Recordings were taken from optic tract… Expand
Attentional control of early perceptual learning.
- M. Ahissar, S. Hochstein
- Psychology, Medicine
- Proceedings of the National Academy of Sciences…
- 15 June 1993
The performance of adult humans in simple visual tasks improves dramatically with practice. This improvement is highly specific to basic attributes of the trained stimulus, suggesting that the… Expand
Reverse hierarchies and sensory learning
- M. Ahissar, M. Nahum, I. Nelken, S. Hochstein
- Psychology, Medicine
- Philosophical Transactions of the Royal Society B…
- 12 February 2009
Revealing the relationships between perceptual representations in the brain and mechanisms of adult perceptual learning is of great importance, potentially leading to significantly improved training… Expand
At first sight: A high-level pop out effect for faces
To determine the nature of face perception, several studies used the visual search paradigm, whereby subjects detect an odd target among distractors. When detection reaction time is set-size… Expand
Learning Pop-out Detection: Specificities to Stimulus Characteristics
Training induces dramatic improvement in the performance of pop-out detection. In this study, we examined the specificities of this improvement to stimulus characteristics. We found that learning is… Expand
Transduction in invertebrate photoreceptors: role of pigment bistability.