Table 1.
Number (%) of children per group analyzed for each morpheme.
| Morpheme | Late talkers (n = 34) | Typically developing (n = 20) |
|---|---|---|
| *Progressive –ing | 20 (59)a | 14 (70) |
| *Personal pronouns | 34 (100) | 20 (100) |
| Possessive personal pronouns | 9 (27) | 6 (30) |
| *Plural –s | 22 (65) | 17 (85) |
| *Preposition in | 24 (71) | 18 (90) |
| Preposition on | 5 (15) | 4 (20) |
| Possessive –'s | 1 (3) | 1 (5) |
| Past tense –ed | 4 (12) | 2 (10) |
| *Irregular past tense | 20 (59) | 12 (60) |
| *Regular third person –s | 20 (59) | 15 (75) |
| *Irregular third person | 31 (91) | 19 (95) |
| *Article | 34 (100) | 20 (100) |
| *Contractible copula be | 33 (97) | 20 (100) |
| *Uncontractible copula be | 33 (97) | 20 (100) |
| *Contractible auxiliary be | 22 (65) | 8 (40) |
| Uncontractible auxiliary be | 2 (6) | 3 (15) |
| *Modal | 29 (85) | 19 (95) |
| Derivational | 0 (0) | 0 (0) |
| Irregular plural | 6 (18) | 3 (15) |
| *Auxiliary do | 22 (65) | 13 (65) |
| Auxiliary have | 0 (0) | 0 (0) |
| Adjectival | 3 (9) | 2 (10) |
| *Negation | 26 (77) | 14 (70) |
Note. A morpheme was not analyzed for a child if fewer than four obligatory contexts were present. A morpheme was analyzed only if at least eight children in each group had at least four obligatory contexts. The 14 analyzed morphemes are marked with an asterisk.
a
No significant group differences by χ2 for any morpheme.