メタコントラストにおける色選択性の一対比較法による解析

Abstract

In metacontrast masking of chromatic stimuli, visibility of a target stimulus is reduced by a similar-colored mask. The degree of metacontrast was measured as a function of color difference between target and mask for 8 isoluminant colors using the paired-comparison method. Color selectivity of metacontrast did not differ between cardinal (L–M or S–(L M)) and intermediate mask colors. The width of color tuning was comparable to that predicted from linear combinations of cone outputs. These results suggest that colorselective metacontrast results from intra-channel interaction of color signals in multiple channels that combine cone signals in a linear fashion.