Table 1.

Number of participants within each age and gender group.

Age group (years)	Mean age (years)	SD	N	Gender		Location of testing
				Female (%)	Male (%)	Our lab	School
6	6.50	0.31	18	50	50	2	16
7	7.64	0.24	15	47	53	0	15
8	8.50	0.34	16	56	44	1	15
9	9.49	0.29	23	43	57	2	21
10	10.35	0.23	24	54	46	0	24
Totals			96	51	49	5	91