Fifty-nine children and a subsample of 10 children of the same age who attended specialist regional schools participated in further investigations.
2
Subsample surveys In addition to the full cohort studies, four subsample surveys have been carried out.
3
Subsample surveys In addition to the full cohort studies, four subsample surveys In addition to the full cohort studies, four subsample surveys have been carried out.
4
The data were derived from a nationally representative subsample of students who participated in the 2002 main NAEP reading assessment.
5
The subsample Z - Z v is used to construct the predictor d.