Table 2.
Phase I Language Measures by Child Age Group
| Age Sample: | 2–17 months n = 51 |
18–24 months n = 44 |
25+ months n = 51 |
Full Sample N=146 |
|---|---|---|---|---|
| Mean (SD) Range |
Mean (SD) Range |
Mean (SD) Range |
Mean (SD) Range |
|
| Age (mos) at Recording | 8.97 (4.08) 2.66–16.24 |
21.43(1.72) 19.14–24.43 |
34.22(5.42) 26.66–48.21 |
21.48(11.41) 2.66–48.21 |
| Recordings per Family | 4.82(1.73) 1–7 |
3.77(1.55) 1–6 |
5.14(1.13) 2–7 |
5.17(1.35) 1–7 |
| Conversational Turns SS | 99.93(10.13) 82.11–127.35 |
97.76(15.5) 61.30–131.02 |
100.82(12.59) 77.59–131.06 |
99.99(12.64) 61.30–135.42 |
| Adult Word Count SS | 105.52(20.69) 62.55–152.74 |
96.72(16.12) 57.41 – 129.03 |
101.01(15.74) 68.75–141.42 |
101.56(18.05) 57.41–152.74 |
| Child Vocal-ization SS | 101.26(9.85) 81.34–130.71 |
97.32(14.41) 60.27–122.77 |
99.87(10.88) 71.65–124.69 |
99.94(11.30) 60.27–130.71 |
| Conversational Turns Count | 285 (120) 118–750 |
440(221) 59 – 967 |
548 (232) 212–1166 |
428 (224) 59–1,166 |
| Adult Word Count | 14,484(6,022) 4,256–30,794 |
11,768(4,159) 3,372–21,069 |
12,928(4,342) 5,305–25,810 |
13,218(5,079) 3,372–30,794 |
| Child Vocal-ization Count | 1,110(396) 449 – 2,227 |
1,736 (716) 321–3,439 |
2,316(728) 711–4,176 |
1,730 (786) 321–4,176 |
| aLanguage Skills | 100.70(8.81) 80.5–122.5 |
104.06(13.2) 76.00–130.00 |
112.21(15.74) 56.00–139.00 |
105.69(13.70) 56.00–139.00 |
| bVocabulary | 13.95(25.38) 0–125 n = 44 |
177.48(143.86) 1–470 n = 27 |
455.79(168.96) 187–670 n=19 |
156.29(203.55) 0–670 N = 90 |
Note: LENA SS (standard scores) age-normalized to mean=100, SD=15. LENA Counts reflect totals across a 12-hour recording day.
a
Language Skills score was unavailable for one child in the 25+ months age group.
b
MacArthur-Bates Vocabulary scores were unavailable for some participants outside the assessment age range.