Double Conjuction of Orientation and Luminance Polarity

Papathomas TV, Gorea A, Fehér A, Conway TE. "Attention-based texture segregation," Perception & Psychophysics, vol. 61(7), 1399-1410, 1999.

		Do you see a vertical "edge" in this image, that separates the left and right parts? See figures B and C below. So, as you see form Figures B and C, there IS a vertical "edge" in Figure A. It is masked by the so-called "double conjunction" of the orientation and polarity (black/white). What features are visible in Figures B and C?


Only the white bars of image A are shown		Only the -45 degree oriented bars of image A are shown

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