6.2 Sample

The sample should be the study children who participated in wave 1 at 9 months.

Ideally the age 3 interview would take place in the month after the children turns 36

months old, both for consistency with Cohort 08 and for intra-cohort consistency.

Given the continuing rapid pace of development in the early years, it is important that

Cohort 24 are interviewed at the same month of age as much as possible – although

the need to retain individual participants in the study means that there will likely need

to be some exceptions to this.

6.3 Respondents Outside the Household