Paper in Vision Research
- Colin W.G. Clifford, and Erin
Weston (2005). Aftereffect of adaptation to Glass patterns.
Vision Research, 45, 1355-1363.
Our visual systems constantly adapt their representation
of the environment to match the prevailing input. Adaptation
phenomena provide striking examples of perceptual plasticity
and offer valuable insight into the mechanisms of sensory
coding. Here, we describe an aftereffect of adaptation to
a spatially structured image whereby an unstructured test
stimulus takes on illusory structure locally perpendicular
to that of the adaptor. Objective measurement of the strength
of the aftereffect for different patterns suggests a neural
locus of adaptation prior to the extraction of complex form
in the visual processing hierarchy, probably at the level
of primary visual cortex. This view is supported by further
experiments showing that the aftereffect exhibits partial
interocular transfer but complete transfer across opposite
contrast polarities. However, the aftereffect does show weak
position invariance, suggesting that adaptation at higher
levels of the visual system may also contribute to the effect.