Table 1. Bright light therapy use and Quotient attention measures.

Measures	Beta	P value	% Variancea
Accuracy	0.41	0.036	13.8%
Errors of Omission	-0.53	0.014	30.7%
Errors of Commission	-0.28	0.199	7.2%
Latency	-0.19	0.345	3.6%
Variability	-0.38	0.069	14.3%

Association between percent bright light therapy device use on pre-treatment–post-treatment measures of attention and vigilance on the Quotient ADHD system.

^aEffect size (percent variance accounted for) was determined using the variance decomposition method of Lindeman, Merenda and Gold [73, 74].