Maddess T, Davey M P, Srinivasan M V, James A C
Centre for Visual Sciences, Research School for Biological Sciences, Australian National University, Canberra, Australian Capital Territory.
Aust N Z J Ophthalmol. 1998 May;26 Suppl 1:S95-7. doi: 10.1111/j.1442-9071.1998.tb01387.x.
The Craik-O'Brien Cornsweet effect (COCE) is a visual illusion where the luminance of image boundaries sets the apparent brightness of enclosed regions. The COCE may be produced by the cortex constructing the observed brightness through a lateral 'filling-in' process: propagating brightness information from the edges of the enclosed regions towards their centres. Any such filling-in process would imply a speed of propagation.
Data on the propagation speed of brightness information in two different brightness induction effects are compared using a multivariate regression analysis.
RESULTS/CONCLUSION: We demonstrate similar non-zero speeds for the COCE and for a brightness contrast effect.
