Table 1.

Characteristics of participants: age, sex, and hand dominance (n = 616)

Age	No. of Boys	Dominance		No. of girls	Dominance
		Right	Left		Right	Left
6-7	75	69	6	51	48	3
8-9	53	46	7	54	47	7
10-11	42	40	2	45	44	1
12-13	60	53	7	42	38	4
14-15	46	43	3	54	51	3
16-17	35	33	2	40	37	3
18	7	7	0	12	12	0
Total	318	291 (91%)	27 (8.4%)	298	277 (93%)	21 (7%)