Schematic representations of 3D biological motion stimuli and results of Experiment 1.

Abstract

<p>(A) During each trial, a pair of point-light walker sequences with horizontal binocular disparity was presented to the left and right eyes of the observer through a mirror stereoscope. (B) A series of point-light walkers, either facing toward (T-trial) or away (A-trial) from the observer defined by stereoscopic cues were displayed in random order. Observers were divided into experimental and control groups according to their perceived depth information. (C) The upper panel shows the contrast of accuracy for in-depth facing orientation judgment between the two groups, with the physical in-depth facing orientations combined or separated. Observers in the experimental group correctly identified the in-depth rotating direction of point-light sphere (lower left panel), yet their performance for discriminating the depth-reversed point-light walkers was at chance level (lower right panel). Error bars indicate one SEM.</p