Table A1.

Eye motion statistics. Notes: The overall eye motion of the three subjects during this task is consistent with typical fixation statistics reported in the literature (see review by Martinez-Conde, Macknik, & Hubel, 2004).

	Subject 1		Subject 2		Subject 3
	Eye motion X, Y (SD in arc min) (time in s)	Saccade freq (Hz)	Eye motion X, Y (SD in arc min) (time in s)	Saccade freq (Hz)	Eye motion X, Y (SD in arc min) (time in s)	Saccade freq (Hz)
Condition A	2.0, 1.5 (t = 413)	0.26	2.5, 2.3 (t = 167)	0.35	3.1, 2.0 (t = 376)	0.60
Condition B	2.6, 2.6 (t = 603)	0.41	3.9, 2.3 (t = 420)	0.46	2.5, 1.5 (t = 649)	0.23
Condition C	2.2, 1.5 (t = 17)	0.36	2.4, 2.1 (t = 17)	0.24	2.8, 2.3 (t = 47)	0.47