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Vision Res. 2013 Jul 19;87:35-45. doi: 10.1016/j.visres.2013.05.008. Epub 2013 Jun 1.

The company they keep: background similarity influences transfer of aftereffects from second- to first-order stimuli.

Author information

1
Department of Neuroscience, Columbia University, New York, NY 10032, USA. nq6@columbia.edu

Abstract

A wealth of studies has found that adapting to second-order visual stimuli has little effect on the perception of first-order stimuli. This is physiologically and psychologically troubling, since many cells show similar tuning to both classes of stimuli, and since adapting to first-order stimuli leads to aftereffects that do generalize to second-order stimuli. Focusing on high-level visual stimuli, we recently proposed the novel explanation that the lack of transfer arises partially from the characteristically different backgrounds of the two stimulus classes. Here, we consider the effect of stimulus backgrounds in the far more prevalent, lower-level, case of the orientation tilt aftereffect. Using a variety of first- and second-order oriented stimuli, we show that we could increase or decrease both within- and cross-class adaptation aftereffects by increasing or decreasing the similarity of the otherwise apparently uninteresting or irrelevant backgrounds of adapting and test patterns. Our results suggest that similarity between background statistics of the adapting and test stimuli contributes to low-level visual adaptation, and that these backgrounds are thus not discarded by visual processing but provide contextual modulation of adaptation. Null cross-adaptation aftereffects must also be interpreted cautiously. These findings reduce the apparent inconsistency between psychophysical and neurophysiological data about first- and second-order stimuli.

PMID:
23732217
PMCID:
PMC3760381
DOI:
10.1016/j.visres.2013.05.008
[Indexed for MEDLINE]
Free PMC Article

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