| Predictors of success |
| Language production |
| Language comprehension |
| Phonologic repertoire |
| Imitation |
| Play skills |
| Use of gestures |
| Social skills |
| Risk factors for speech-language impairment |
| Otitis media |
| Family history of language and learning problems |
| Caregiver characteristics (eg, low socioeconomic status, directive rather than responsive interaction style) |
