Table 4.
Subscale Internal Consistency for Behavior Observation Grids, internal consistency and intraclass correlation agreement for Developmental Level Scales.
| Subscales | Internal consistency (n = 100) | Inter-rater reliability (n = 24) | ||||
|---|---|---|---|---|---|---|
| Behavior coding | Developmental coding | Developmental coding | ||||
| KR20 | Number of items | Cronbach α | Number of items | Intraclass correlation agreement | CCI 95% | |
|
| ||||||
| Socio-affective domain | ||||||
| Social interactions | .83 | 10 | .80 | 9 | .84 | .68–1.00 |
| Behavior regulation | .83 | 15 | .74 | 8 | .90 | .79–1.00 |
| Joint attention | .81 | 9 | .87 | 10 | .85 | .75–.95 |
| Expressive language | .91 | 11 | .85 | 7 | .94 | .88–1,00 |
| Comprehensive language | .85 | 8 | .90 | 9 | .84 | .75–.93 |
| Vocal imitation | .84 | 15 | .84 | 6 | .80 | .68–.92 |
| Gesture imitation | .75 | 12 | .79 | 6 | .89 | .80–.98 |
| Affective relation | .73 | 9 | .80 | 12 | .82 | .70–.94 |
| Emotional expression | .59 | 8 | .73 | 11 | .58 | .38–.78 |
| Cognitive domain | ||||||
| Self image | .85 | 18 | .86 | 12 | .76 | .59–.93 |
| Symbolic play | .74 | 7 | .71 | 5 | .89 | .81–.97 |
| Object-relation schemata | .67 | 6 | .82 | 5 | .77 | .65–.89 |
| Operational causality | .80 | 8 | .51 | 6 | .83 | .68–.98 |
| Means aims | .84 | 16 | .80 | 9 | .89 | .79–.99 |
| Spatial relations | .89 | 14 | .93 | 8 | .84 | .75–.93 |
| Object permanence | .94 | 19 | .81 | 5 | .81 | .68–.94 |