Table 2.
Internal consistency reliability of all sCPEP-3 subtests, and test–retest reliability (N = 62) and interrater reliability of the sCPEP-3 Performance Test (N = 59)
| sCPEP-3 subtests | Internal consistency reliability | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Cronbach’s alphas of different age groups | MICC | N | No. of items | |||||||
| 2 | 3 | 4 | 5 | 6 | 7 | Total | ||||
| Performance Test | ||||||||||
| CVP | 0.93 | 0.93 | 0.95 | 0.95 | 0.97 | 0.97 | 0.95 | 0.44 | 549 | 34 |
| EL | 0.95 | 0.95 | 0.95 | 0.94 | 0.95 | 0.96 | 0.95 | 0.47 | 551 | 25 |
| RL | 0.95 | 0.96 | 0.96 | 0.95 | 0.96 | 0.97 | 0.96 | 0.62 | 553 | 19 |
| FM | 0.85 | 0.85 | 0.90 | 0.86 | 0.91 | 0.93 | 0.89 | 0.32 | 554 | 20 |
| GM | 0.85 | 0.86 | 0.86 | 0.63 | 0.84 | 0.84 | 0.81 | 0.35 | 554 | 15 |
| VMI | 0.84 | 0.89 | 0.89 | 0.88 | 0.90 | 0.91 | 0.89 | 0.51 | 551 | 10 |
| AE | 0.81 | 0.86 | 0.86 | 0.86 | 0.88 | 0.93 | 0.87 | 0.39 | 554 | 11 |
| SR | 0.84 | 0.88 | 0.88 | 0.87 | 0.89 | 0.92 | 0.88 | 0.43 | 553 | 12 |
| CMB | 0.83 | 0.86 | 0.87 | 0.86 | 0.90 | 0.86 | 0.86 | 0.30 | 554 | 15 |
| CVB | 0.59 | 0.76 | 0.79 | 0.84 | 0.88 | 0.78 | 0.77 | 0.29 | 496 | 11 |
| Caregiver Report | ||||||||||
| PB | 0.75 | 0.81 | 0.83 | 0.83 | 0.82 | 0.80 | 0.81 | 0.30 | 551 | 10 |
| PSC | 0.77 | 0.77 | 0.84 | 0.79 | 0.84 | 0.81 | 0.80 | 0.33 | 551 | 13 |
| AB | 0.87 | 0.86 | 0.85 | 0.85 | 0.89 | 0.85 | 0.86 | 0.29 | 549 | 15 |
| Composites | ||||||||||
| Communication | 0.98 | 0.98 | 0.98 | 0.98 | 0.99 | 0.99 | 0.98 | 0.47 | 546 | 78 |
| Motor | 0.94 | 0.94 | 0.95 | 0.93 | 0.96 | 0.97 | 0.95 | 0.49 | 551 | 45 |
| Maladaptive behaviors | 0.93 | 0.94 | 0.94 | 0.95 | 0.96 | 0.93 | 0.94 | 0.28 | 495 | 49 |
| sCPEP-3 Subtests | Test–retest reliability | r | Interrater reliability | ||||||
|---|---|---|---|---|---|---|---|---|---|
| First testing (N = 62) | Second testing (N = 62) | Polychoric correlation coefficients (N = 59) | |||||||
| M | SD | M | SD | Min | Max | Median | Mean | ||
| Performance Test | |||||||||
| CVP | 34.05 | 15.59 | 38.22 | 14.72 | 0.96** | 0.36 | 0.98 | 0.87 | 0.81 |
| EL | 17.70 | 13.13 | 19.52 | 13.60 | 0.98** | 0.32 | 1.00 | 0.93 | 0.88 |
| RL | 18.13 | 11.93 | 20.75 | 11.18 | 0.95** | 0.61 | 0.98 | 0.88 | 0.87 |
| FM | 28.77 | 7.15 | 30.43 | 6.57 | 0.94** | 0.47 | 1.00 | 0.84 | 0.81 |
| GM | 25.02 | 5.75 | 26.46 | 3.95 | 0.82** | 0.20 | 1.00 | 0.78 | 0.78 |
| VMI | 12.07 | 4.85 | 13.46 | 4.87 | 0.90** | 0.54 | 0.87 | 0.71 | 0.73 |
| AE | 14.85 | 3.56 | 15.15 | 3.34 | 0.78** | 0.54 | 0.88 | 0.70 | 0.71 |
| SR | 13.64 | 4.12 | 14.30 | 4.06 | 0.89** | 0.19 | 0.90 | 0.65 | 0.65 |
| CMB | 22.87 | 4.86 | 22.66 | 4.29 | 0.73** | 0.47 | 0.87 | 0.70 | 0.67 |
| CVB | 12.84 | 3.62 | 13.61 | 2.89 | 0.75** | 0.33 | 0.83 | 0.65 | 0.64 |
| Caregiver Report | |||||||||
| PB | – | – | – | – | – | – | – | – | – |
| PSC | – | – | – | – | – | – | – | – | – |
| AB | – | – | – | – | – | – | – | – | – |
| Composites | |||||||||
| Communication | – | – | – | – | – | – | – | – | – |
| Motor | – | – | – | – | – | – | – | – | – |
| Maladaptive behaviors | – | – | – | – | – | – | – | – | – |
MICC mean inter-item correlation coefficients, CVP cognitive verbal/preverbal, EL expressive language, RL receptive language, FM fine motor, GM gross motor, VMI visual-motor imitation, AE affective expression, SR social reciprocity, CMB characteristic motor behaviors, CVB characteristic verbal behaviors, PB problem behaviors, PSC personal self-care, AB adaptive behavior
**p < .01