Table 1.

Impulsivity experiment. Number of children in the delay/explore condition categorized as showing each of the tool-related exploratory behaviours during the 10 s exploratory delay. As the delay was very short, each child only performed one of the behaviours listed.

age group	n	touch	pick up	combine	bend (non-target tool)	bend/unbend target tool
		hook task
4–5	14	2	8	2	1	1
6–7	11	1	2	1	4	3
		unbending task
4–5	14	2	7	1	2	2
6–7	11	2	3	4	0	2