Table 1.
Mean (SD) of SES variables and reported vocabulary in typically-developing (TD) and late-talking children (LT)
| Full Sample (n=82) |
Language Groupa |
|||
|---|---|---|---|---|
| TD (n=46) |
LT (n=36) |
t(80) | ||
| Maternal ed (yrs) | 16.6 (1.3) | 16.5 (1.3) | 16.7 (1.3) | 0.58, ns, d = 0.1 |
| Hollingsheadb | 58.4 (8.5) | 59.0 (8.1) | 57.6 (9.1) | 0.77, ns., d = 0.2 |
| Vocabulary (raw)c | ||||
| 18 mos | 76.7 (76.0) | 121.1 (73.3) | 20.0 (15.7) | 7.9, p < .001, d = 1.9 |
| 21 mos | 183.2 (153.7) | 277.5 (140.3) | 62.0 (50.3) | 8.7, p < .001, d = 2.0 |
| 24 mos | 292.6 (187.0) | 396.4 (154.7) | 159.9 (133.6) | 7.3, p < .001, d = 1.6 |
| 30 mos | 505 6 (157.9) | 569.3 (108.6) | 419.3 (174.5) | 4.7, p < .001, d = 1.0 |
a
Groups based on percentile for words produced on the CDI: Words & Sentences at 18 months (see text).
b
Hollingshead 4-factor Index of Social Status (Hollingshead, 1975)
c
Number of words reported as “understands & says” on the CDI: Words & Sentences