Table 1 Infant visits and vocalisations by age.

From: Vocalisations are coupled with movement of all limbs throughout infancy

Time Point

Age

(M ± SD

Age

range

N Infants

N

Vocalisations

N Vocalisations

Per Infant

(M ± SD)

Vocalisation Duration (ms, M ± SD)

Recording Duration

(s, M ± SD)

T1: 4 mo

4.36 ± 0.29

3.9–5.2

61

2095

34 ± 33

593 ± 483

313 ± 29

T2: 6 mo

6.59 ± 0.40

6.0–7.8

75

2423

32 ± 24

589 ± 537

313 ± 30

T3: 9 mo

9.06 ± 0.35

8.2–10.0

69

1764

26 ± 19

547 ± 460

315 ± 40

T4: 12 mo

12.14 ± 0.52

11.0–14.5

72

2247

31 ± 19

638 ± 577

325 ± 78

  1. Number of visits and vocalisations from infants participating at each age point. An individual infant could contribute data only once at each specific age.
Back to article page