Appendix B.
Comparisons between all A-phase data (A1 and A2 combined, baseline plus postexperimental phases) and the relevant B phase data (from fluency-inducing conditions) 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 | 0.70* | 0.39 | 1.01 | 0.29 | -0.53* | -0.75 | -0.31 | 0.36 |
| NA | -0.41* | -0.58 | -0.24 | 0.28 | -0.25* | -0.39 | -0.11 | 0.54 | |
| SFSPM | -10.93* | -16.61 | -5.24 | 0.22 | -0.80 | -4.72 | 3.13 | - | |
| %SS | 2.43* | 1.53 | 3.41 | 0.22 | - | - | - | ||
| Chorus | Effort | 2.26* | 1.77 | 2.74 | 0.98 | -1.13* | -1.40 | -0.84 | 0.57 |
| NA | -0.21 | -0.50 | 0.08 | - | -1.63* | -1.79 | -1.46 | 2.08 | |
| SFSPM | -5.14 | -12.13 | 1.85 | - | 52.23* | 46.57 | 57.90 | 2.03 | |
| %SS | 8.31* | 6.49 | 10.13 | 1.07 | - | - | - | ||
| Whispering | Effort | 2.12* | 1.75 | 2.49 | 1.08 | -0.85* | -1.18 | -0.52 | 0.58 |
| NA | -3.38* | -3.59 | -3.16 | 3.28 | -2.70* | -2.97 | -2.42 | 2.01 | |
| SFSPM | -10.13* | -15.37 | -4.88 | 0.24 | 24.23* | 18.99 | 29.47 | 0.76 | |
| %SS | 7.87* | 6.54 | 9.19 | 0.97 | - | - | - | ||
| Rhythm | Effort | 2.59* | 2.18 | 3.01 | 1.28 | -2.37* | -2.73 | -2.00 | 1.26 |
| NA | -3.71* | -3.97 | -3.45 | 3.74 | -3.63* | -3.98 | -3.27 | 2.19 | |
| SFSPM | 24.89* | 16.33 | 33.45 | 0.51 | 154.86* | 148.88 | 160.82 | 5.99 | |
| %SS | 10.24* | 8.15 | 12.33 | 1.08 | - | - | - | ||
*
Mean of data from A1 and A2 phases combined differed significantly from mean of B-phase data