Chunk #3 — Methods and Materials — Participants

Source: Neuropsychological functioning and severity of ADHD in early childhood: a four-year cross-lagged study.
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There were no differences between TD and H/I groups on gender, ethnicity, or race (all p >.10). However, although both groups were well within the middle class range, they differed on family SES (see measures below) at BL [Mean (SD) TD=69.16 (14.89); H/I= 61.28 (17.87); p=.001].