Table 7.

Descriptive statistics of two groups visual stimuli patterns fatigue rate.

Groups	Visual stimuli patterns	N	Mean	Std. deviation	Minimum	Maximum
Simple patterns	P25-25-25	22	4.95	2.578	2	10
	P30-30-30	22	4.29	2.591	1	10
	P35-35-35	22	2.95	2.459	1	10
Rhythmic patterns	P25-30-35	22	2.90	2.278	0	7
	P30-25-35	22	4.57	2.712	1	10
	P25-35-30	22	3.48	2.600	0	9
	P30-35-25	22	3.76	2.548	0	9
	P35-25-30	22	4.81	2.657	1	10
	P35-30-25	22	4.29	2.101	1	9

N, Number of subjects; Mean, Average fatigue rate for all subjects in each pattern; Std. Deviation, Fatigue rate standard deviation in 22 subjects respect to each pattern; Minimum, min fatigue rate for each pattern; Maximum, maximum fatigue rate for each pattern.