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Adaptation to combinations of form, colour, and movement

journal contribution
posted on 2010-05-01, 00:00 authored by Alex BurmesterAlex Burmester, Jack Broerse
Observers typically report illusory colour on achromatic gratings after being adapted to orthogonally oriented gratings presented in complementary colours, where the colour apparent on each grating is complementary to the one that had been presented with that grating during adaptation (McCollough, 1965 Science149 1115–1116). We used this procedure, but presented homogenous fields at test instead of achromatic gratings. When adaptation stimuli moved in directions locally orthogonal to their orientation, we found that, for up to 7–8 min after adaptation, a flower-like illusory pattern was evident on both homogenous fields; after this time illusory radial lines and concentric circles were evident and were colour-contingent (eg for adaptation with green concentric circles and magenta radial lines, concentric circles were apparent on a magenta test field and radial lines were apparent on a green test field). When stimuli were stationary during induction, colour-contingent illusory forms were also apparent at test. The results demonstrate that an aftereffect, reciprocal to the McCollough effect, can be produced under appropriate induction conditions, and that this effect is not due to retinal afterimages.

History

Journal

Perception

Volume

39

Issue

5

Pagination

620 - 626

Publisher

SAGE Publications

Location

London, Eng.

ISSN

0301-0066

eISSN

1468-4233

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2010, SAGE Publications

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