What is learned during perceptual learning? We address this question by analyzing how
perceptual inefficiencies improve over the course of perceptual learning (Dosher & Lu …

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 …

Systematic measurements of perceptual learning were performed in the presence of
external or stimulus noise. In the new external noise method (Dosher, B, & Lu, Z.-L.(1997) …

What is learned in perceptual learning? How does perceptual learning change the
perceptual system? We investigate these questions using a systems analysis of the …

Our goal was to differentiate low and mid level perceptual learning. We used a complex
grating discrimination task that required observers to combine information across wide …

Using the external noise plus training paradigm, we have consistently found that two
independent mechanisms, stimulus enhancement and external noise exclusion, support …

The role of feedback in perceptual learning is probed in an orientation discrimination
experiment under destabilizing non-stationary conditions, and explored in a neural-network …

Although practice has long been known to improve perceptual performance, the neural
basis of this improvement in humans remains unclear. Using fMRI in conjunction with a …

Performance in perceptual tasks often improves with practice. This effect is known as
'perceptual learning,'and it has been the source of a great deal of interest and debate over …

Eye-transfer tests, external noise manipulations, and observer models were used to
systematically characterize learning mechanisms in judging motion direction of moving …