WAYFINDING AND THE SAMPLING OF OPTICAL-FLOW BY EYE-MOVEMENTS

N.-G. Kim, R. Growney, and M. T. Turvey (1996) demonstrated the nonnec essity of the DMP strategy, the cornerstone of the wayfinding theory p roposed by J. E. Cutting, K. Springer, P. A. Braren, and S. H. Johnson (1992). Based on the reanalyses of the results of N.-G. Kim et al.'s Experiment 2, J.E. Cutting (1996) proposes another retinal variable DD LO as a substitute for DMP. The evidence for this new variable, howeve r, is only circumstantial. A preferential strategy, we argue, follows from recognizing that different fields of view are samplings of optica l flow that enhance the detection of invariants-such as that which is hypothesized to specify direction of heading.