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particularly if they are not able to attend to the material being presented to them. It has
been shown that children with premorbid ADHD before TBI
perform worse than children
who have incurred a TBI without a history of ADHD. Children who have premorbid
ADHD and incurred a TBI have significantly worse scores on attention,
executive
functioning, and memory tasks (Slomine et al., 2005). Research has shown that on
average 20% of children who incur a TBI have a premorbid diagnosis of ADHD
(Slomine et al., 2005; Gerring et al., 1998). However, it was also found over a 2 year
longitudinal study that the majority of premorbid ADHD cases were of the hyperactive
type. Slomine et al. (2005) showed that over the 2 year period
children with premorbid
ADHD hyperactive symptoms increased after incurring a TBI. After TBI a child with
premorbid ADHD would have increased hyperactive symptomatology which could be
observed by the researcher administering the evaluation. It is possible that some of the
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