Table 4.
Discriminant validity between sentence imitation task (SIT) and Test of Early Grammatical Impairment (TEGI) probe scores with descriptive variables.
| SIT and TEGI variable | Nonverbal IQ | PPVT-4 | EVT-2 | Chronological age |
|---|---|---|---|---|
| 3S SIT | .130 | .322 + | .134 | .290 |
| 3S TEGI | .110 | .332* | .224 | .337* |
| Regular past tense SIT | .264 | .091 | .202 | .272 |
| Regular past tense TEGI | .289 | .351* | .366* | .236 |
| Irregular past tense SIT | .416* | .250 | .297 | .117 |
| Irregular past tense TEGI | .267 | .379* | .432** | .370* |
| BE SIT | .165 | .115 | .114 | .034 |
| BE TEGI | .258 | .382* | .266 | .247 |
| DO SIT | −.076 | −.311 | −.129 | .030 |
| DO TEGI | .318 | .395* | .529** | .328 |
Note. PPVT-4 = Peabody Picture Vocabulary Test–Fourth Edition; EVT-2 = Expressive Vocabulary Test–Second Edition; 3S = third-person singular; BE = auxiliary and copula “be” verbs; DO = auxiliary “do” verbs.
*
p < .050.
**
p < .010.
+
p < .060.