ABSTRACT
This chapter briefly discusses the following topics: (a) How a moving observer might visually judge his or her direction of self-motion. It is argued that differences in the rate of change of magnification across the retinal image may be important in some special situations where the focus of the expanding flow pattern may be of little significance, (b) Visual sensitivity to changing size. We propose that the visual pathway contains a functional subunit that is selectively sensitive to changing size, (c) The stereoscopic perception of moving stimuli. Evidence is reported in support of our proposal that, in addition to the classical stereoscopic subsystem for relative position in depth, the visual pathway contains a second stereoscopic subsystem sensitive to the direction of motion in depth, (d) The relative effectiveness of a monocular and a binocular cue for motion-in-depth sensation. This depends on the object's width and speed and the inspection duration, but hardly at all on the viewing distance, (e) Attempts to extrapolate laboratory models of vision to the description of real-world skilled performance.
