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They used a lot of different measures. I'll try and summarise the key ones here: Academic achievement was measured using the Woodcock-Johnson Psycho-Educationa
by hydrox24 8y ago
They used a lot of different measures. I'll try and summarise the key ones here:
Academic achievement was measured using the Woodcock-Johnson Psycho-Educational Battery Revised, a "commonly used measure of cognitive ability and achievement". They used various sub-tests from this battery for measuring maths/english seperately.
Behavioural problems were measured by reports from mothers. (They used the 1991 "Child Behavior Checklist") This was apparently done to be consistent with the original report.
> [child cognitive indicators were] measured at age 24 months by the Bayley Mental Development Index (MDI; Bayley, 1991) and at age 36 months by the Bracken Basic Concept Scale (BBCS; Bracken, 1984).
And the child's home environment was measured by the HOME inventory (Caldwell & Bradley, 1984).