Table 2.
Mean ages obtained for oral and written language development in a sample of “high-potential” French children in the course of the first three years of life compared to Brunet-Lézine norms.
| Mean age obtained on items observed (Vaivre-Douret) [5] | Reference Brunet-Lézine EAP 1951 revised [9] | |
|---|---|---|
| Babbling (consonants): mean 4 months + 3 weeks. | 7 months | 8 months |
| First words (at least three): mean 9 months + 1 week. | 12 months | 10–17 months |
| Repetition of words in exponential manner from 12 months ± 4 weeks | 18 months | 17 months |
| First phrase (association of two words): mean 18 months ± 2 weeks | 21 months | 20 months |
| Imitation animal noises: mean 22 months ± 2 weeks | — | — |
| Accurate vocabulary, no baby talk language mature, easy, correct use of verb tenses: mean 22 months ± 2 weeks | — | — |
| Early spontaneous identifications letters and figures in the environment: mean 24 months ± 4 weeks | — | — |
| Enjoys giving synonyms or opposites: mean 28 months ± 4 weeks | — | — |
| Uses “I” (first person pronoun): mean 30 months ± 2 weeks | 30 months | 30 months |
| “Pretend” writing: mean 34 months ± 2 week | — | — |
(—) No data from authors.