Supplemental data

18

CB

EXPERIMENTAL

TEXT

DOTS

BINOCULAR

GRID

CONTROL

MONOCULAR

0.25 rad-1

EXPERIMENTAL

CONTROL

VC

EXPERIMENTAL

TEXT

DOTS

BINOCULAR

GRID

CONTROL

MONOCULAR

0.25 rad-1

EXPERIMENTAL

CONTROL

Figure S1: Results of the first experiment, presented in the same format as Figure 2, for the other two subjects. See Figure 2 for explanations and Table 1 for quantitative results.

19

BINOCULAR

CB

GRID

TEXT

DOTS

0.72*

0.71*

0.74*

0.19

0.08

MONOCULAR

0.25 rad-1

0.32*

EXPERIMENTAL

BINOCULAR

SV

CONTROL

GRID

TEXT

DOTS

0.67*

0.65*

0.55*

0.17

0.19

MONOCULAR

0.25 rad-1

0.42*

EXPERIMENTAL

BINOCULAR

VC

CONTROL

GRID

TEXT

DOTS

0.62*

0.56*

0.46*

0.09

0.12

MONOCULAR

0.25 rad-1

0.39*

EXPERIMENTAL

CONTROL

Figure S2: Distributions of initial saccade directions for the three subjects in the first experiment. See Figure 2 for explanations. Values of the Rayleigh R 0 anisotropy parameter are given inside the gray circles, and marked with “*” when the Rayleigh test yields a significant deviation from isotropy (p < 0.05, Bonferroni corrected for 6 tests).

20

NO TASK

AH

EG

TTL

0.39*

0.25*

0.49*

TASK

0.25 rad-1

0.41*

0.23*

0.58*

Figure S3: Individual subject data for the “no-task” and “task” conditions of the second experiment, showing distributions of saccade directions (see Figure 2 for explanations), along with values of the Rayleigh R 0 anisotropy parameter (inside gray circle), marked with “*” when the Rayleigh test yields a significant deviation from isotropy (p < 0.05).

21

CONVEX

AB

FF

SA

0.48*

0.55*

0.35*

0.04

0.29*

CONCAVE

0.25 rad-1

0.12

Figure S4: Individual subject data for the convex and concave stimuli of the third experiment, showing distributions of first saccade directions (see Figure 2 for explanations), along with values of the Rayleigh R 0 anisotropy parameter (inside gray circle), marked with “*” when the Rayleigh test yields a significant deviation from isotropy (p < 0.05).

22