ABSTRACT
Questions immediately arise, however, when the attempt is made to enlarge our perspective to a comparative one. We know what colour vision is from our own perceptual experience-it is the ability to see colours, or to use the terminology employed here, the ability to see particular determinate qualities
belonging to the hue and achromatic categories. Yet how is this conception of colour vision to be applied to other animals? A number of philosophical issues arise with this question. Some will be addressed in the course of this chapter; others will be postponed until Chapter 6. All are best set to one side, however, until we have examined the visual capacities related to colour that are distinguished by visual scientists.
