Table 1.

Multipliers for learning indices in Figure 2A and 2B

Problem	TTC	Multiplier Formula	Multiplier Value
1	40.0	M1 = C1/C1	1.0*
2	21.1	M2 = C1/C2	1.9
3	15.1	M3 = C1/C3	2.6
4	11.0	M4 = C1/C4	3.6
5	10.4	M5 = C1/C5	3.8
6	9.6	M6 = C1/C6	4.2

Abbreviations: C, mean TTC; M, multiplier; 1–6, number of C or M. The muliplier is the mean TTC for the first problem for the control group (in which there is presumably no learning) divided by the mean TTC for that problem. The learning index is the sum of the products of TTC and the appropriate multipliers for all problems. These multipliers are used both for the control group and the treatment groups.

^*Note that the first score can be dropped because there were no group differences at this point. This can be accomplished by substituting zero for the multiplier.