Table 4.
Descriptive statistics from both pre- and posttest on all dependent measures, the results on the t-tests for paired samples, Cohen’s d, and the change per session
| Pretest (n = 52) |
Posttest (n = 46) |
Difference scores (t-tests) |
Change per session | |||||
|---|---|---|---|---|---|---|---|---|
| M | SD | M | SD | t | d | M | SD | |
| Word spelling percentiles | 5.40 | 10.50 | 13.25 | 15.10 | 3.41*** | 0.60 | .26 | 0.56 |
| Percentage of phonological errors | 16.30 | 25.24 | 1.99 | 11.07 | −4.34*** | 0.73 | −.62 | 0.98 |
| Percentage of morphological errors | 33.74 | 28.91 | 14.57 | 17.06 | −5.19*** | 0.71 | −.78 | 1.05 |
| Percentage of orthographical errors | 20.62 | 26.41 | 3.78 | 12.81 | −4.83*** | 0.73 | −.72 | 1.02 |
*p < .05. **p < .01. ***p < .001