Table 5.
Agreement between theoretical and observed age.
| Subscales | Theoretical developmental age in months | |||
| 4–8 | 8–12 | 12–18 | 18–24 | |
|---|---|---|---|---|
| Social interaction | 5.80a | 7.33 | 4.36 | 21.85 |
| 1.79b | 1.86 | 2.91 | 2.64 | |
| Behavior regulation | 6.00 | 10.33 | 13.63 | 21.40 |
| 1.41 | 1.53 | 2.39 | 2.72 | |
| Joint attention | 6.00 | 11.29 | 15.80 | 21.64 |
| 1.41 | 1.60 | 2.17 | 2.65 | |
| Expressive language | 6.64 | 14.00 | 14.80 | 21.85 |
| 1.91 | 3.35 | 2.59 | 2.64 | |
| Comprehensive language | 6.30 | 11.00 | 13.00 | 20.71 |
| 1.64 | 1.41 | 2.28 | 3.26 | |
| Vocal imitation | 6.33 | 12.64 | 19.20 | 22.30 |
| 1.94 | 3.38 | 2.68 | 2.50 | |
| Gesture imitation | 5.71 | 12.11 | 17.60 | 22.00 |
| .95 | 2.37 | 2.61 | 2.59 | |
| Affective relation | 5.00 | 7.75 | 14.50 | 21.50 |
| .0 | 2.83 | 3.16 | 2.85 | |
| Emotional expression | 5.50 | 9.78 | 15.71 | 21.85 |
| .84 | 2.68 | 2.69 | 2.64 | |
| Self-image | 6.25 | 8.00 | 14.73 | 21.46 |
| 1.75 | 2.65 | 3.38 | 3.36 | |
| Symbolic play | 6.64 | 14.38 | 18.90 | 23.00 |
| 1.91 | 3.02 | 3.98 | 2.68 | |
| Object-relation schemata | 6.14 | 8.67 | 17.76 | 23.60 |
| 1.57 | 2.66 | 3.73 | 2.68 | |
| Operational causality | 5.71 | 8.25 | 13.38 | 20.94 |
| .95 | 2.22 | 2.92 | 3.02 | |
| Means end | 6.00 | 10.25 | 15.91 | 22.27 |
| 1.41 | 1.25 | 3.02 | 2.57 | |
| Spatial relations | 6.00 | 8.30 | 13.00 | 20.50 |
| 2.0 | 2.57 | .50 | 3.28 | |
| Object permanence | 6.00 | 12.67 | 15.08 | 22.56 |
| 1.41 | 4.04 | 3.59 | 2.35 | |
aMean of observed age.
bSD of observed age.