TABLE 2.

Means and (standard deviations).

Age group	Condition
	Simple				Mixed
	Congruent		Incongruent		Congruent		Incongruent
	Reaction time	Errors (%)	Reaction time	Errors (%)	Reaction time	Errors (%)	Reaction time	Errors (%)
	M (SD)	M (SD)	M (SD)	M (SD)	M (SD)	M (SD)	M (SD)	M (SD)
5–6	671.92 (149.69)	2.71 (4.71)	969.58 (228.74)	9.30 (7.87)	1178.47 (210.63)	11.43 (10.95)	1206.64 (216.73)	14.24 (12.44)
8–9	529.00 (163.29)	0.97 (2.00)	703.02 (209.62)	5.43 (6.90)	908.15 (220.62)	9.50 (10.62)	938.05 (245.36)	5.23 (6.31)

Dots task.