Fig. 1
From: Playing stereoscopic video games enhances the precision but not the accuracy of depth perception
3D video game experience modifies stereo acuity, but not stereo bias. (A) Stereo bias before and after 40 h of 3D video game play (stereo biaspre and stereo biaspost, respectively). Most data points are scattered around the gray 1:1 reference line. Inset figure, the visual task was to determine the stereoscopic depth of the central square, in front or behind, relative to the reference background. Positive stereo bias, in front of the reference background (toward the observer). Negative stereo bias, behind the reference background (away from the observer). Stereo bias was expressed in seconds of arc (”). Open black circle, mean pre-gaming and post-gaming stereo bias. Sample size, 21. (B) Psychometric curves before and after playing 3D video games (dashed and solid curves, respectively). After gaming, there was a statistically significant improvement in mean stereo threshold, but not in mean stereo bias (red curves). (C) Percent change in stereo threshold as a function of percent change in stereo bias after 3D video game play. Our correlation analysis suggests that the changes in threshold and bias were essentially uncorrelated (coefficient of determination, 0.007). Inset, stereo threshold before and after 40 h of 3D video game play (stereothresholdpre and stereothreshold post, respectively, replotted here from our previous study1).
