Published online by Cambridge University Press: 28 July 2022
This chapter reviews current topics within the subfield of perception with an emphasis on nonhuman primates. We review the psychophysical approach to the study of perception and misperception, including its application to the study of visual illusions and perceptual completion. Geometric illusions emerge when a target stimulus is embedded in an illusory-inducing context and include size illusions such as the Ebbinghaus–Titchener and Delboeuf illusions as well as line-length illusions such as the Ponzo illusion and Müller–Lyer illusion. We review differential perception of these illusions by primates and other species to understand better the role of perceptual processing mode and experimental design in the emergence of illusory experiences. Additionally, perceptual completion has contributed to our knowledge of the mechanisms underlying primate perception and includes studies on amodal completion and illusory contours. Current topics concerning these areas of research are emphasized, such as grouping mechanisms and other mechanisms of perceptual processing.
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