Table 1.
Pre-experimental Characteristics by Dose Frequency Groups and Diagnoses.
| Pre-treatment characteristic | Group | DS M(SD) | NDS M(SD) | d for dose frequency | d for diagnosis |
|---|---|---|---|---|---|
| Chronological age in months | LDF | 22.50(3.09) | 23.54(3.50) | ||
| HDF | 21.62(2.61) | 22.10(2.92) | |||
| Total | 22.02(2.83) | 22.85(3.26) | .39 | -.27 | |
|
| |||||
| Bayley III mental age in months | LDF | 12.69(1.66) | 12.20(2.54) | ||
| HDF | 12.05(2.09) | 13.36(1.86) | |||
| Total | 12.34(1.91) | 12.76(2.28) | -.08 | -.20 | |
|
| |||||
| Bayley III CC | LDF | 65.94(6.38) | 63.33(6.73) | ||
| HDF | 63.95(7.18) | 68.93(5.25) | |||
| Total | 64.86(6.80) | 66.03(6.60) | -.21 | -.17 | |
|
| |||||
| Number of words spoken on MB-CDI | LDF | .94(1.34) | 2.73(6.91) | ||
| HDF | 1.37(1.61) | .86(1.03) | |||
| Total | 1.17(1.48) | 1.83(5.03) | .19 | -.19 | |
LDF = low dose frequency. HDF = high dose frequency. DS = Down syndrome. NDS = Non-Down syndrome intellectual disability. CC = Cognitive Composite standard score.