Appendix C.
Comparisons between A1 (baseline) and A2 (postexperimental) data, from 38 mixed model analyses using non-central t-distributions in computing confidence intervals
| Persistent Stuttering Group |
Control Group |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Condition |
Variable |
Difference between means |
95% confidence interval of the difference |
Cohen’s d |
Difference between means |
95% confidence interval of the difference |
Cohen’s d |
||
| Masking | Effort | 0.33 | -0.02 | 0.69 | - | 0.23 | -0.02 | 0.49 | - |
| NA | -0.05 | -0.25 | 0.15 | - | -0.04 | -0.20 | 0.12 | - | |
| SFSPM | 0.60 | -6.05 | 7.08 | - | -5.20* | -9.73 | -0.67 | 0.25 | |
| %SS | -0.17 | -1.26 | 0.91 | - | - | - | - | ||
| Chorus | Effort | 0.65 | -0.23 | 0.88 | - | 0.45* | 0.12 | 0.78 | 0.33 |
| NA | 0.15 | -0.26 | 0.41 | - | 0.14 | -0.05 | 0.34 | - | |
| SFSPM | 3.60 | -11.62 | 4.52 | - | -2.77 | -9.31 | 3.77 | - | |
| %SS | 1.26 | -1.47 | 2.73 | - | - | - | - | ||
| Whispering | Effort | 0.14 | -0.29 | 0.56 | - | 0.10 | -0.28 | 0.48 | - |
| NA | 0.08 | -0.33 | 0.17 | - | -0.08 | -0.40 | 0.24 | - | |
| SFSPM | -2.50 | -8.64 | 3.47 | - | -3.22 | -9.27 | 2.84 | - | |
| %SS | 0.89 | -0.65 | 2.41 | - | - | - | - | ||
| Rhythm | Effort | 0.85* | 0.37 | 1.33 | 0.45 | -0.17 | -0.59 | 0.26 | - |
| NA | 0.05 | -0.35 | 0.25 | - | 0.20 | -0.21 | 0.61 | - | |
| SFSPM | -5.10 | -14.00 | 5.77 | - | -4.05 | -10.94 | 2.84 | - | |
| %SS | 1.27 | -1.13 | 3.69 | - | - | - | - | ||
*
Mean of A1 data differed significantly from mean of A2 data