Table 3.
Bayley-III-NL developmental growth (DG) for each age group
| Developmental domain | Age group 1 0–35.9 months |
Age group 2 36–71.9 months |
Age group 3 72–107.9 months |
Age group 4 ≥108 months |
All ages | |
|---|---|---|---|---|---|---|
| Cognitiona | Number | 5 | 10 | 6 | 7 | 28 |
| DG in mo/6 mo, mean (±1 SD) | 3.5 (3.2) | 1.2 (2.0) | 0.7 (1.0) | –0.9 (2.8) | 1.0 (2.6) | |
| Minimum–maximum | 0.6–7.0 | −1.9–3.9 | −0.4–2.4 | −7.0–1.7 | −7.0–7.0 | |
| Receptive language | Number | 4 | 7 | 4 | 5 | 20 |
| DG in mo/6 mo, mean (±1 SD) | 2.5 (1.5) | 0.3 (2.5) | −0.4 (1.5) | 0.1 (1.9) | 0.6 (2.1) | |
| Minimum–maximum | 0.5–3.8 | −2.8–3.1 | −2.0–1.2 | −3.0–2.2 | −3.0–3.8 | |
| Expressive language | Number | 4 | 7 | 4 | 5 | 20 |
| DG in mo/6 mo, mean (±1 SD) | 3.3 (1.5) | 0.6 (2.4) | 1.3 (0.9) | 1.7 (2.5) | 1.5 (2.1) | |
| Minimum–maximum | 1.0–4.4 | −4.4–3.1 | 0.0–2.0 | 0.0–6.0 | −4.4–6.0 | |
| Fine motor functioning | Number | 4 | 8 | 6 | 5 | 23 |
| DG in mo/6 mo, mean (±1 SD) | 2.5 (2.5) | 0.4 (3.8) | 0.3 (1.2) | −0.5 (1.0) | 0.5 (2.6) | |
| Minimum–maximum | 0.0–5.7 | −6.7–7.2 | −1.2–2.1 | −1.8–0.6 | −6.7–7.2 | |
| Gross motor functioning | Number | 5 | 8 | 5 | 4 | 22 |
| DG in mo/6 mo, mean (±1 SD) | 1.4 (2.2) | 2.0 (2.1) | −1.1 (2.4) | −1.0 (1.7) | 0.7 (2.4) | |
| Minimum–maximum | −1.0–4.3 | −1.0–5.1 | −4.0–1.2 | −2.0–1.5 | −4.0–5.1 |
DG developmental growth, mo months
aData of individual 31 were excluded from this table because WPPSI-III-NL results cannot be compared with the Bayley-III-NL. The cognitive DG for this individual was 0.9 months per 6 months