Table 1.

Demographic information of the sample

Participant SES-related variables (N = 84)
Cohort [mean (SD) age between LENA and MRI]
6-month-old group	7.16 (1.46)
30-month-old group	31.35 (1.57)
Maternal education [main caregiver; total (%)]
Left school	1 (1.19%)
GCSE/O levels equivalent	13 (15.48%)
A levels or equivalent	8 (9.52%)
Trade apprenticeship	2 (2.38%)
Some university	10 (11.90%)
Bachelor's degree	33 (39.28%)
Master's degree	10 (11.90%)
Doctorate or professional degree	7 (8.33%)
Annual household income [median in GBP; total (%)]
5200	1 (1.19%)
7799.5	1 (1.19%)
12,999.5	4 (4.76%)
18,199.5	8 (9.52%)
28,599.5	9 (9.64%)
33,799.5	8 (9.64%)
38,999.5	3 (3.61%)
44,199.5	22 (27.71%)
52,000	28 (34.94%)

GCSE, General Certificate of Secondary Education. Participant's age is reported in months.