“…Though internal
consistency for this form version has not been reported with preschoolers,
similar versions have reported internal consistency upwards of .87 with
preschoolers (McGoey, DuPaul, Haley, &
Shelton, 2007). In addition, there are strong validity data on
this widely-used scale (e.g., Casat, Norton,
& Boyle-Whitesel, 1999; Nolan
& Gadow, 1994; Pelham et al,
1989), and findings suggest that construct equivalence applies
across children from different ethnic groups (Reid, Casat, Norton, Anastopoulos, & Temple,
2001). Internal reliability for this sample was adequate
( α oppositional = .87,
α inattentive = .82).…”