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Effect of measurement setting in judging traveled distance: additional evidence for underestimation of distance in virtual environments

There has been a substantial amount of research on two different but related problems: estimating distances of perceived objects ("how far away is that thing?") and estimating traveled distance ("how far did I just walk?"). For instance, Lappe et al [2007] recently examined a "leaky path integration" model to account for travel distance judgments in a virtual environment.