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. 2015 Feb 10;9:46. doi: 10.3389/fnhum.2015.00046

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Copyright © 2015 Dowiasch, Marx, Einhäuser and Bremmer.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Illustration of a typical scene during calibration and the two tasks. Images were taken from the head mounted camera of the ESC. The red square indicates the current gaze position of a participant. (A) Calibration: Fixating stationary targets with a fixed distance of 7° as projected by a head-fixed laserpointer of the ESC (enhanced in this figure for visualization). (B) Task I: Walking down the hallway with free gaze and (C) Task II: visually tracking two stationary targets on the floor while walking straight-ahead.