Table 1.

Comparison of visual detection for light and dark stimuli at different contrast ranges

Eccentricity (°)	Contrast range (%)	Contrast polarity	All errors (%)	Mislocation errors (%)	Missed targets (%)	Reaction time (ms)
5–30	5–20	Darks	16.08 ± 12.89	7.68 ± 7.25	8.40 ± 10.49	682.5 ± 119.6
		Lights	17.37 ± 12.90	7.80 ± 6.84	9.58 ± 10.93	689.7 ± 119.2
		p value	p < 0.00001	p = 0.1652	p < 0.00001	p = 0.00042
	5	Darks	34.86 ± 14.82	15.96 ± 10.99	18.90 ± 17.44	815.4 ± 136.4
		Lights	32.42 ± 14.25	14.50 ± 10.16	17.93 ± 16.89	804.2 ± 130.6
		p value	p = 0.0035	p = 0.0077	p = 0.3263	p = 0.0426
	10–20	Darks	8.45 ± 6.31	4.38 ± 3.44	4.07 ± 4.58	627.8 ± 87.3
		Lights	11.22 ± 8.61	5.13 ± 4.06	6.86 ± 6.67	647.3 ± 96.6
		p value	p < 0.00001	p = 0.00039	p < 0.00001	p < 0.00001

From left to right, eccentricity range (all measurements averaged across all eccentricities), contrast range (measurements averaged across 5–20%, 5%, or 10–20% contrast), contrast polarity (dark or light), errors (all, mislocation, missed), and reaction times. The numbers within each cell are mean ± SD and p values that show there is no difference between darks and lights. Significant p values (<0.05) are highlighted in bold.