Table 4.

Frequencies of solution strategies during the first (pre-set proportion 1:2) task, and during the critical phase.

	Pre-additive	Fixed interval	Changing interval	a-per-b	a-per-Δ	Multiplicative	Speeds	Sum
Tasks
Task 1	33 (87)	12 (20)	17 (27)	20 (28)	7 (7)	38 (162)	15 (24)	142 (355)
Critical phase	30 (70)	10 (20)	12 (18)	7 (8)	4 (4)	38 (38)	3 (4)	104 (162)

Absolute frequencies are given (i.e., sum of the students who used that solution strategy). Total amount of used solution strategies are given between brackets. Note that time on task has not been taken into account.