Table 3. CDI Scores across Visits.
| Visit 1 | Visit 2 | Visit 3 | Visit 4a | ||
|---|---|---|---|---|---|
| Infant Form | Toddler Form | Toddler Form | Toddler Form / CDI-III | ||
| M (SD) | M (SD) | M (SD) | M (SD) | M (SD) | |
| Range | Range | Range | Range | Range | |
| CDI - ASD | |||||
| Total Words Produced | 102.70 | 223.07 | 306.66 | 48.00 | 60.60 |
| (96.75) | (191.13) | (224.16) | (83.95) | (12.44) | |
| 0-258 | 0-548 | 0-580 | 0-197 | 45-74 | |
| Count-Nouns Produced | 55.35 | 120.42 | 132.92 | 24.80 | 23.60 |
| (58.14) | (102.34) | (105.05) | (12.44) | (48.33) | |
| 0-159 | 0-262 | 0-291 | 0-98 | 14-31 | |
| CDI - TYP | |||||
| Total words produced | 118.5 | 335.53 | 503.8 | 68.00 | |
| (114.4) | (159.08) | (156.65) | (27.01) | ||
| 8-316 | 100-601 | 138-657 | 22-99 | ||
| Count-Nouns Produced | 76.00 | 185.57 | 258.06 | 26.00 | |
| (73.18) | (76.05) | (44.28) | (6.87) | ||
| 2-210 | 61-272 | 195-311 | 22-32 | ||
Note: “Total Understands and Says” from the Infant Form, and “Total Words Produced” from the Toddler Form and Level III forms are presented in this table. Maximum number of words that a child can produce on CDI Infant Form is 396, on Toddler Form is 680, and on Level III is 100.
a
The Toddler Form was used for children with ASD who had produced fewer than 250 words at Visit 3 (n = 5), and the Level III was used for children with ASD whose vocabularies had included more than 250 words at Visit 3 (n = 9). The Level III form was used for all of the TYP children.