Table 2.
Results for suppliance, omission, substitution, and oversuppliance for late talker/comparison groups.
| Morpheme | n per group | Percentage suppliancea | Percentage omission | Percentage substitution | Sum substitutionsb | Sum oversupplianceb |
|---|---|---|---|---|---|---|
| Progressive –ing | 20/14 | 99/97 | 1/3 | 0/0 | 0/1 | 5/0 |
| Personal pronouns | 34/20 | 95/97 | 4/3 | 1/0 | 6/0 | 0/3 |
| Plural –s | 22/16 | 99/98 | 1/2 | 0/0 | 0/0 | 4/2 |
| Preposition in | 24/17 | 99/100 | 1/0 | 0/0 | 0/0 | 2/1 |
| Irregular past tense | 19/12 | 95/99 | 2/0 | 3/1 | 5/2 | 0/1 |
| Regular third person –s | 20/15 | 83/96 | 16/4 | 1/0 | 1/0 | 5/3 |
| Irregular third person | 29/18 | 99/96 | 1/1 | 0/2 | 1/3 | 1/0 |
| Articles | 34/20 | 93/95 | 6/3 | 11 | 7/7 | 6/4 |
| Contractible copula BE | 32/20 | 94/96 | 6/3 | 0/1 | 2/2 | 8/4 |
| Uncontractible copula BE | 33/20 | 89/94 | 9/4 | 1/2 | 6/5 | 2/1 |
| Contractible auxiliary BE | 21/8 | 92/97 | 8/3 | 0/0 | 0/0 | 5/1 |
| Modal verbs | 29/19 | 96/99 | 4/1 | 0/0 | 0/0 | 0/0 |
| Auxiliary DO | 22/13 | 91/88 | 9/12 | 0/0 | 0/0 | 0/0 |
| Negation –n't | 27/14 | 99/98 | 1/2 | 0/0 | 0/0 | 0/0 |
| Verbal compositec | 34/20 | 89/95 | 11/4 | 1/1 | 9/7 |
a
Percentage suppliance, omission, and substitution do not always sum to 100% due to rounding.
b
The values for “sum substitutions” and “sum oversuppliance” represent total occurrences per group.
c
The verbal composite represents a sum of regular third person, regular past tense, BE copula and auxiliary, and DO auxiliary morphemes divided by sum of their obligatory contexts.