screen fillarc

>>screen fillarc?

Usage:

Screen(windowPtr,'FillArc',[color],[rect],startAngle,arcAngle)

Fills an arc with the given color, inscribed within "rect"."color" is the clut index (scalar or [r g b] triplet) that you want to poke into each pixel; default produces black with the standard CLUT for this window's pixelSize. Default "rect" is entire window. Angles are measured in degrees, clockwise from vertical.

Fahle, M. and Poggio, T. Perceptual Learning

Rubin, N., Nakayama, K. and Shapley, R. (2002), The role of insight in perceptual learning: evidence from illusory contour perception. Perceptual Learning, Fahle, M. and Poggio, T. (Eds.), MIT Press.

Rubin, Nakayama, and Shapley (1996)a

Rubin, N., Nakayama, K., and Shapley, R.M. Enhanced perception of illusory contours in the lower versus the upper visual hemifields. Science. 651-653, 1996.

　Inducing Figure の傾きの弁別と主観的輪郭線(modal interpolation) による弁別を比較している

Rubin, Nakayama, and Shapley (1996)b

Rubin, N., Nakayama, K., and Shapley, R.M. Abrupt learning and retinal size specificity in illusory-contour perception. Current Biology 7, 461-467, 1997

輪郭線の知覚
　知覚学習が網膜像の大きさに規定されるとしている

測定関数のモデル
The fraction of times that the subject judged the stimulus to be thin was plotted as a function of the inducers’ rotation angle. A sigmoid curve ([1+tanh(β(x-α))]/2) was fit to the data, with the slope(β)and bias(α) as free parameters. The threshold, defined as the inducers’ rotation angle needed to reach 82% correct discrimination, was estimated from the fitted curve.