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Perceptual Grouping in Space and in Space-Time: An Exercise in Phenomenological Psychophysics

The first two sections of this chapter are devoted to empirical and theoretical studies of grouping in space and in spacetime. In the first section we summarize recent research on grouping by proximity. We show that grouping by proximity can be modeled with a simple model that has few of the characteristics that one might expect of a Gestalt phenomenon. In the second section we (a) review the literature on the relation between grouping by spatial proximity and grouping by spatiotemporal proximity, and (b) summarize our research that shows that these two processes are inextricably entangled. The third section is meta-methodological. We do phenomenological psychophysics. Because the observers’ responses are based on phenomenal experiences, which are still in bad repute among psychologists, we conclude the chapter with an explication of the roots of such skeptical views, and show that they have limited validity.