Table 3.

Distribution of eye position in experiment 3

Region of eye positionHeadTubeWall
Head looks at tube1.04 (0.30)97.86 (0.73)0.27 (0.13)
Head looks at wall1.02 (0.35)97.51 (0.78)0.21 (0.14)
t (df 28)0.050.320.30
P0.9620.7490.769
  • Mean percent of looking time among subjects for three display regions, one around the head (an area 10° wide × 11° high, centered on and encompassing the head), one around the tube (an area 10° wide × 11° high, centered on and encompassing the tube), and one around the wall opposite the head (an area 5° wide × 14° high, encompassing the area in front of the wall and the wall itself, located at the edge of the display). Numbers in parentheses are SE. Statistical comparison between “head looks at tube” and “head looks at wall” conditions used two-sample, two-tailed t tests. Eye position data were taken from a time window in each trial during which subjects were instructed to perform the tilt-estimation task.