Table 1.
Descriptive data on child language sample measures divided by zygosity and home visit (HV).
| Child language measure | MZ |
DZ |
||||
|---|---|---|---|---|---|---|
| n | M (SD) | Range | n | M (SD) | Range | |
| HV2 | ||||||
| TCICU | 205 | 139.78 (48.20) | 10–272 | 282 | 135.59 (45.61) | 10–236 |
| MLU | 197 | 5.65 (1.05) | 3–10 | 272 | 5.707 (1.26) | 3–10 |
| NTW | 163 | 524.73 (103.63) | 263–887 | 224 | 530.55 (112.37) | 314–887 |
| NDW | 163 | 189.96 (28.35) | 104–275 | 224 | 191.10 (29.29) | 126–274 |
| TNC | 163 | 36.83 (18.81) | 5–109 | 224 | 37.70 (20.34) | 5–109 |
| HV3 | ||||||
| TCICU | 178 | 141.02 (48.92) | 31–272 | 209 | 137.45 (47.38) | 21–279 |
| MLU | 174 | 5.98 (1.32) | 2–12 | 199 | 5.978 (1.41) | 2–10 |
| NTW | 136 | 555.99 (114.81) | 222–1,025 | 164 | 548.82 (128.89) | 281–904 |
| NDW | 136 | 199.99 (27.51) | 99–279 | 164 | 196.93 (32.15) | 125–267 |
| TNC | 136 | 42.13 (20.21) | 6–121 | 164 | 41.23 (20.86) | 6–95 |
Note. MZ = monozygotic; DZ = dizygotic; TCICU = total complete and intelligible conversational units (C-units); MLU = mean length of utterance/C-unit; NTW = number of total words; NDW = number of different words; TNC = total number of conjunctions.