Table 2. Mean score (standard deviation) by age group on rotation (max = 16), paper folding (max = 14), vocabulary and block design.

	Y1	Y3	Y5
Rotation	12.89 (3.89)	14.15 (2.42)	15.64 (0.58)
Paper folding	5.03 (3.59)	7.97 (3.04)	11.28 (1.89)
Vocabulary	22.89 (5.29)	30.76 (5.86)	35.62 (5.20)
Block design	11.91 (6.08)	19.15 (9.52)	34.10 (13.25)