Table 3.
Syllable repetition task (SRT) findings for participants in the childhood apraxia of speech (CAS), adult-onset apraxia of speech (AAS), and speech delay (SD) groups.
| Group | Descriptive statistics |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Performance |
Encoding |
Memory |
Transcoding |
|||||||||
| n | M | SD | n | M | SD | n | M | SD | n | M | SD | |
| SD | 119 | 121 | 119 | 119 | ||||||||
| Percentage | 67.8 | 16.4 | 50.8 | 19.8 | 0.77 | 0.20 | 82.4 | 15.8 | ||||
| z-score | −0.64 | 1.04 | −0.18 | 1.01 | −0.42 | 1.22 | −0.75 | 1.56 | ||||
| CAS (PM+) | 36 | 35 | 36 | 36 | ||||||||
| Percentage | 67.0 | 15.5 | 46.1 | 16.5 | 0.74 | 0.16 | 70.8 | 18.3 | ||||
| z-score | −1.80 | 1.73 | −0.71 | 0.69 | −1.13 | 1.38 | −2.45 | 2.02 | ||||
| AAS (PM+) | 16 | 14 | 16 | 16 | ||||||||
| Percentage | 77.4 | 15.6 | 44.5 | 21.8 | 0.85 | 0.15 | 75.7 | 21.9 | ||||
| z-score | −2.37 | 2.27 | −0.73 | 0.97 | −1.64 | 2.49 | −3.46 | 2.20 | ||||
| Inferential statistics using z-scores | ||||||||||||
| Comparison | Performance | Encoding | Memory | Transcoding | ||||||||
| effect size a | CI | effect size | CI | effect size | CI | effect size | CI | |||||
| CAS and SD | −0.94 L | −1.32, −0.55 | −0.56 M | −0.94, −0.17 | −0.56 M | −0.94, −0.18 | −1.01 V | −1.40, −0.62 | ||||
| AAS and SD | −1.39 V | −1.93, −0.84 | −0.54 M | −1.07, −0.02 | −0.85 L | −1.39, −0.32 | −1.64 V | −2.20, −1.08 | ||||
| CAS and AAS | 0.29 | −0.30, 0.89 | −0.03 | −0.59, 0.65 | 0.28 | −0.31, 0.87 | 0.48 | −0.25, 0.93 | ||||
Note. PM+ = positive for pause marker; CI = confidence interval.
a
Effect size: Small (S) >0.2; Medium (M) >0.5; Large (L) >0.8; Very Large (V) >1.0; Extremely Large (E) > 2.0. Significant effect sizes are underlined.