Investigation of color vision and color appearance on dichromats. Expansion to new Kansei in color vision-

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Dichromats(color deficient observers) used color names of Red and Green in the color naming task on chromatic stimuli(color chips) without wavelengths corresponding to Green and Red for color normal observers. Additionally, the relationship between color chips and color names in this condition was consistent well with the result under the normal viewing condition. These results indicate that, for dichromats, middle and long wavelengths corresponding to Red and Green are not necessarily needed for the naming of Red and Green. The present results are consistent to the hypothesis that the response of the red-green color opponent mechanism is little or none. Moreover, the results directly indicate that dichromats are using stimulus intensity as the cue of the color naming. Thus, this present study denies the other hypothesis that dichromats have almost the same qualia in color appearance with color normal observers by using hybrid-cones and rods.