Table 1.

Characteristics for the sample of 626 participants (Sample A) that underwent three tests, the subset of 200 participants who performed ten tests (Sample B) and up to 253 participants who were tested with five visual illusions (Samples C; n = 173 to 253).

Samples	Female subjects	Male subjects	p
Sample A (n = 626)	342	284
Age (mean ± sd)	32.19 ± 15.16	33.09 ± 16.03	p = 0.48
Age range	18–75	18–82
Sample B (n = 200)	113	87
Age (mean ± sd)	43.67 ± 23.5	46 ± 25.98	p = 0.51
Age range	18–86	18–90
Samples C
Ebbinghaus (n = 209)	93	116
Age (mean ± sd)	35.37 ± 17.01	33.00 ± 15.25	p = 0.29
Age range	18–73	18–80
Müller-Lyer (n = 253)	115	138
Age (mean ± sd)	36.02 ± 16.01	33.47 ± 14.19	p = 0.19
Age range	18–73	18–80
Ponzo (n = 173)	76	97
Age (mean ± sd)	28.92 ± 10.18	28.95 ± 9.49	p = 0.99
Age range	18–55	18–54
Ponzo-Hallway (n = 194)	84	110
Age (mean ± sd)	36.67 ± 17.44	32.72 ± 14.82	p = 0.10
Age range	18–73	18–80
Tilt (n = 200)	93	107
Age (mean ± sd)	38.64 ± 16.28	37.13 ± 14.88	p = 0.50
Age range	18–73	18–80