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The reverse hierarchy theory of visual perceptual learning
Task difficulty and the specificity of perceptual learning
It is shown here that the degree of specificity depends on the difficulty of the training conditions, and it is found that the pattern of specificities maps onto the patterns of receptive field selectivities along the visual pathway.
Attentional control of early perceptual learning.
It is found that practicing one task did not improve performance in an alternative task, even though both tasks used exactly the same visual stimuli but depended on different stimulus attributes, suggesting that specific high-level attentional mechanisms, controlling changes at early visual processing levels, are essential in perceptual learning.
Reverse hierarchies and sensory learning
The essentials of reverse hierarchy theory for perceptual learning in the visual and auditory modalities are summarized and the theory's implications for designing improved training procedures are described, for a variety of goals and populations.
Phototaxis and Thermotaxis in Some Species of Amphistegina (Foraminifera)
SYNOPSIS Positive phototaxis was demonstrated in specimens of Amphistegina radiata within the range of photonic fluxes of 1011 to 1015 photons × cm-2× sec-1. No response was found at lower
How Serial is Serial Processing in Vision?
Evidence is presented that there are parallel processing constituents to this serial search for an element defined by the conjunction of its colour and orientation and there was an increase in processing speed with increase in number of elements to be scanned.