Browse by author
Lookup NU author(s): Dr Jeroen Granzier
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
We used classification images to examine whether certain parts of a surface are particularly important when judging its colour, such as its centre, its edges, or where one is looking. The scene consisted of a regular pattern of square tiles with random colours from along a short line in colour space. Targets defined by a square array of brighter tiles were presented for 200 ms. The colours of the tiles within the target were biased by an amount that led to about 70% of the responses being correct. Subjects fixated a point that fell within the target’s lower left quadrant and reported each target’s colour. They tended to report the colour of the tiles near the fixation point. The influence of the tiles’ colour reversed at the target’s border and was weaker outside the target. The colour at the border itself was not particularly important. When coloured tiles were also presented before (and after) target presentation they had an opposite (but weaker) effect, indicating that the change in colour is important. Comparing the influence of tiles outside the target with that of tiles at the position at which the target would soon appear suggests that when judging surface colours during the short “glimpses” between saccades, temporal comparisons can be at least as important as spatial ones. We conclude that eye movements are important for colour vision, both because they determine which part of the surface of interest will be given most weight and because the perceived colour of such a surface also depends on what one looked at last.
Author(s): Brenner E, Granzier JJ, Smeets JBJ
Publication type: Article
Publication status: Published
Journal: Vision Research
Year: 2007
Volume: 47
Issue: 19
Pages: 2557-2568
ISSN (print): 0042-6989
ISSN (electronic): 1878-5646
Publisher: Pergamon
URL: http://dx.doi.org/10.1016/j.visres.2007.06.003
DOI: 10.1016/j.visres.2007.06.003
Altmetrics provided by Altmetric
