Measuring cognition delay caused by gaze movement toward the direction of depth.

It is difficult to judge from face images and/or from biological signal (such as brain waves) what the driver's state of cognition is. This paper reports experiments measuring the state of cognition accompanied with gaze movement in the direction of depth. While measuring the cognition time, the experimental setup was able to measure the effect of gaze movement in the direction of depth. When the locations of displays were changed, there was no significant difference in the reaction time for the reflective/discriminative experiment. Experiments conducted to know gaze depth movement show a trend where the longer the gaze moving distance becomes, the more the discernment time increases. Results also show that it takes much more time in moving gaze toward far in the direction of depth as opposed to moving toward the near.