Table 1.
Mean scoresa (and standard deviations) on standardized language and IQ measures among the three participant groups.
| Persistent Language Delay (n = 10) | Late-Bloomer (n = 10) |
Typical Controls (n = 15) |
|
|---|---|---|---|
| 2 to 2.5 years old | |||
| MCDI-T, Total productive vocabulary | 83.7 (130.5) | 184.8 (129.4) | 440.9 (158.2) |
| MCDI-T, Complexity score | 5.1 (12.8) | 11.5 (10.2) | 34.1 (14.9) |
| CDIIT, Receptive subtest | 94.9 (18.2) | 110.4 (12.4) | 126.1 (9.3) |
| CDIIT, Productive subtest | 74.4 (9.2) | 82.1 (6.0) | 111.1 (11.7) |
| 4 years old | |||
| CLDS-R, Receptiveb | 44.2 (8.0) | 56.7 (3.2) | 58.7 (3.7) |
| CLDS-R, Expressivec | 39.0 (5.0) | 52.1 (3.8) | 54.1 (3.9) |
| TONI-3 | 112.7 (8.9) | 113.4 (6.5) | 118.3 (8.6) |
Notes. MCDI-T = Mandarin-Chinese version of the McArthur Communicative Development Inventories (Toddler Form; Liu and Tsao, 2010); CDIIT = Comprehensive Developmental Inventory for Infants and Toddlers (Wang et al., 2002); CLDS-R = Child Language Disorder Scale-Revised (preschool versions: Lin et al., 2008); TONI–3 = Test of Noverbal Intelligence, third edition (Wu et al., 2006).
a
Raw score in MCDI; standard score in CDIIT and TONI-3; t-score in CLDS.
b
Receptive language subtest.
c
Expressive language subtest.