Table 3.
Means and Standard Deviations of Variables used in Confirmatory Factor Analysis (First Four Variables) and in the Structural Equation Model
| Variable | Mean | SD |
|---|---|---|
| Complexity of Communication | 8.85 | 1.41 |
| PLS-4a Language Comprehension | 22.91 | 5.47 |
| Weighted Total Play | 33.09 | 20.10 |
| MSELb Nonverbal Composite Raw | 41.70 | 12.04 |
| Ratec of Adult Input Home Time 1c | 4.09 | 1.49 |
| Amount of AAC Instructiond | 3.13 | 1.07 |
| Rate of Different Words Home Time2 | 1.30 | 1.40 |
| Rate of Different Words Scripted (Assessment at Time 2) | .71 | 1.08 |
a
PLS-4 is the Preschool Language Scale.
b
MSEL is the Mullen Scales of Early Learning.
c
Rates are # per minute.
d
Amount of instruction is based on a scale of 1–5.