Spatial
Independency in Perceived Lengths of Saccade-Induced Images
A. Noritake, J. Watanabe, H. Ando, M. Terao, & A. Yagi |
When
observers make a saccade across a flickering light dot at the same
location, they usually perceive an array of dots (Hershberger, 1987).
This phenomenon can be exploited for presenting two-dimensional images
using only a single dimensional light source such as a single column
of LEDs or laser projectors. In the present study, we investigated
whether the perceived length of saccade-induced images is modulated
by relative position of the light source and the observer. Participants
were presented with a continuous laser-lit dot at several different
Locations adjacent to a saccade target. On each trial, they were
required to make a saccade from a fixation point to the saccade target
and then to localize the two endpoints of perceived line induced
by the saccade. The results showed that the perceived length of the
saccade-induced lines was approximately a half of the distance between the fixation point and the saccade target regardless of the light source location. Key words: saccade, saccade-based display, phantom line, spatial characteristics |