Table 4.

Distribution of vertical and horizontal time, and mean developmental eye movement

	Mean vertical time (SD)	Mean horizontal time (SD)	Mean DEM ratio (SD)
Age (years)
8	40.63 (13.43)	81.42 (38.40)	1.74 (0.33)
9	38.18 (11.63)	79.04 (35.33)	1.79 (0.29)
10	35.59 (10.18)	68.42 (24.12)	1.77 (0.28)
11	36.08 (13.25)	71.53 (31.69)	1.77 (0.30)
12	34.11 (9.81)	63.20 (20.86)	1.73 (0.29)
P value*	<0.0001	<0.0001	0.318

Note:

^*One way ANOVA (P < 0.05, considered significant).

Abbreviations: DEM, developmental eye movement; SD, standard deviation.