Table 3.
F Values at Posttest
| Effects |
||||
|---|---|---|---|---|
| Outcome measures | Pretest (1) | Difficulty status (1) | Treatment (2) | Site (1) |
| Number combinations (127) | 89.99*** | 4.56* | 10.63*** | NS |
| Procedural calculations (127) | 161.02*** | NS | 13.10*** | 4.06* |
| Word problems | ||||
| Find X (127) | 16.56*** | 13.91*** | 3.22* | 11.32*** |
| Number sentences (117)a | 15.50*** | NS | 17.48*** | 14.30*** |
| KeyMath (126) | 36.16*** | 16.76*** | 3.36* | 45.83*** |
| Iowa (126) | 43.47*** | 4.77* | NS | 13.93*** |
| Vanderbilt Story Problems (127) | 19.45*** | 6.47* | 14.64*** | 6.39* |
Note. Denominator degrees of freedom are in parentheses next to the measures; numerator degrees of freedom are next to the effects. Denominator degrees of freedom change because different effects were trimmed from the model depending on which interactions occurred for which outcomes. NS = not significant.
a
The interaction between pretest and difficulty was significant, F (1, 117) = 7.06, p < .01.
*
p < .05.
***
p < .001.