From neurons to motorway madness
How do we encode the speed of movements of objects and ourselves as they move through the visual world? In this talk I will present psychophysical and neurophysical evidence for the notion that we have specialised detectors for image movement, and that the encoding of speed is, at best, a haphazard affair. As a result many changes in the visual world can result in changes in apparent speed of objects or of our own movements. Using virtual reality simulators I will show that these phenomena transfer from the laboratory to realistic settings and may explain excessive driving speeds under foggy conditions.