concrete operational reasoning

conservation of volume

3 (1)

9 (3)

7 (3)

conservation of weight

23 (1)

25 (1)

29 (3)

conservation of area

5 (3)

20 (3)

24 (3)

conservation of length

1 (1)

26 (3)

28 (3)

class inclusion

2 (2)

13 (2)

21 (1)

euclidian space

6 (4)

16 (2)

19 (5)

spatial relations

4 (3)

10 (3)

14 (2)

1-to-1 correspondence

8 (5)

12 (5)

17 (5)

velocity

18 (1)

22 (2)

30 (1)

transitivity

11 (2)

15 (2)

27 (1)

answers 1 = 1 11 = 2 21 = 1

2 = 2 12 = 5 22 = 2

3 = 1 13 = 2 23 = 1

4 = 3 14 = 2 24 = 3

5 = 3 15 = 2 25 = 1

6 = 4 16 = 2 26 = 3

7 = 3 17 = 5 27 = 1

8 = 5 18 = 1 28 = 3

9 = 3 19 = 5 29 = 3

10 = 3 20 = 3 30 = 1