Table 4.

Performance of different age groups.

Age (n)	Forward attemptsMean (SD)	Backward attemptsMean (SD)	Forward errorsMean (SD)	Backward errorsMean (SD)
6 (7)	3.57 (0.53)	3.28 (0.95)	9.71 (2.36)	9.00 (2.94)
7 (10)	4.50 (1.80)	4.50 (1.35)	12.20 (6.01)	10.60 (4.99)
8 (8)	5.00 (0.75)	4.00 (0.92)	13.12 (4.76)	10.50 (3.96)
9 (8)	4.87 (1.45)	4.50 (1.69)	12.12 (4.29)	11.87 (8.23)
10 (13)	5.30 (0.94)	4.84 (0.55)	14.46 (6.09)	11.61 (4.50)
11 (5)	4.80 (1.78)	5.40 (1.34)	9.61 (2.07)	11.20 (4.54)
≥12 (9)	6.66 (1.65)	6.44 (1.81)	11.66 (7.61)	14.55 (5.50)

SD (standard deviation).