Table 3.
Mean (and s.d.) Vocal Productions in Two Risk Groups
| Age | Risk Group | # Total Vocalizations (Speech + Non-speech) | # Speech-like Vocalizations | Total # Consonants | # Early Consonants | # Middle Consonants | # Late Consonants | % Canonical Syllables | % Non-speech Productions |
|---|---|---|---|---|---|---|---|---|---|
| 6 | HR | 36.5 (27.4) | 15.0 (16.0) | 2.5 (2.9) | 1.5 (1.7) | 0.5 (1.1) | 0.5 (0.9) | 4.5 (7.0) | 60.2 (28.6) |
| mo. | LR | 39.2 (27.8) | 18.3 (15.3) | 3.7 (3.9) | 2.1 (2.2) | 1.1 (1.4) | 0.5 (0.9) | 8.3 (11.5) | 57.0 (25.2 |
| 9 | HR | 25. 7 (19.6) | 15.1 (16.2) | 2.7 (3.0) | 1.9 (1.7) | 0.5 (0.9) | 0.4 (0.8) | 8.7 (11.5) | 50.6 (31.7) |
| mo. | LR | 31.1 (18.6) | 22.6 (16.4) | 5.6 (3.9) | 3.2 (2.1) | 1.3 (1.4) | 1.1 (1.1) | 20.5 (17.6) | 34.0 (24.2) |
| 12 | HR | 35.2 (18.1) | 12.6 (16.8) | 6.26 (3.6) | 3.8 (2.2) | 1.6 (1.2) | 0.8 (0.9) | 27.1 (22.9) | 36.5 (28.4) |
| mo. | LR | 39.1 (18.1) | 31.9 (15.7) | 7.3 (3.7) | 4.5 (2.1) | 1.8 (1.5) | 1.0 (1.1) | 28.8 (19.0) | 19.3 (16.1) |
HR =High Risk group LR=Low Risk group
*
Significant difference between groups at p<.05