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Abstract:
During navigation, humans recruit many different sources of information to monitor distance, including: static visual cues, dynamic visual cues (optic flow), and nonvisual cues (proprioceptive/efferent and vestibular). In a series of studies conducted in a large-scale, outdoor environment, subjects were presented with a distance via various cue combinations and were required to match this distance using the same or different cue combinations. Probe trials were also used to assess performance after learning two distances that were supposedly identical, but in fact differed in magnitude. The results were fitted to a linear model involving a weighted average of various cues.
