26
CONTEMPORARY THEORIES OF ADHD
BarkleyÕs 4 types of executive function:
Barkley goes on to distinguish between
two types
of attention – that which is Òcontingency-shapedÓ
and that which is Òself-regulated and goal
directedÓ (Barkley, 1999, p. 310), arguing that
the former is not impaired in ADHD children, whereas the latter is
impaired.