Table 4 One sample t test results comparing measured ratio of problems solved in 1 try to the equivalent “gaming the system” calculated value

1

0.87 (sd = 0.16)

0.33

33.13

99.00

< 0.001

2-1

0.84 (sd = 0.18)

0.50

18.55

89.00

< 0.001

2-2

0.82 (sd = 0.18)

0.33

26.11

88.00

< 0.001

3-1

0.75 (sd = 0.27)

0.50

3.99

18.00

0.001

3-2

0.56 (sd = 0.27)

0.21

4.82

13.00

< 0.001

4

0.81 (sd = 0.24)

0.17

9.43

12.00

< 0.001

5

0.81 (sd = 0.18)

0.50

5.38

8.00

0 .001

6

0.88 (sd = 0.00)

0.10

–

–

–