The Study of Visual Depth and Distance Perception in Animals

Abstract

The chapter describes Spalding's pioneer observations methods for the study of space perception in animals, as well as the results with implications for the nature-nurture problem. The aim of the study of depth and distance perception with animals is simply an understanding of space related behavior. To show how depth and distance behavior can be investigated in animals, the chapter discusses: (1) methods of investigating depth and distance perception; (2) the visual stimulus for space perception : the “cues” for space perception in animals are assessed and the results of research cited; (3) a comparative analysis of the depth perception of various species; (4) the effects of dark-rearing on depth and distance perception; and (5) the neurophysiological aspects of space perception. The years of research since Spalding have brought the development of better behavioral techniques, of ways to analyze the effects of lack of stimulation on the visual system, and of many neurophysiological techniques to alter visual input, selectively block it off, or record it.