Table 2.
Means (Standard Deviations) for Study Variables
| Construct | Age (months) | HR Infants | LR Infants | All Infants |
|---|---|---|---|---|
| Cognitive Abilitya | 12 | 103.86 (11.97) | 107.94 (10.46) | 105.53 (11.49) |
| Motor Imitation | 12 | 1.78 (0.84) | 1.91 (0.90) | 1.83 (0.86) |
| RJA | 12 | 2.10 (1.93) | 2.24 (2.00) | 2.15 (1.95) |
| 15 | 3.00 (2.13) | 3.79 (2.20) | 3.32 (2.18) | |
| Expressive Vocabulary | 12 | 4.88 (6.99) | 5.59 (7.50) | 5.17 (7.16) |
| 15 | 15.34 (19.13) | 18.88 (19.60) | 16.77 (19.29) | |
| 18 | 40.50 (43.77) | 63.26 (66.65) | 49.71 (54.99) |
a
Cognitive ability was assessed using the Mullen Scales of Early Learning (MSEL; Mullen, 1995), Early Learning Composite (ELC).