Concurrent and discriminant validity of the Gordon Diagnostic System: A preliminary study
CONCURRENT AND DISCRIMINANT VALIDITY OF THE
GORDON DIAGNOSTIC SYSTEM:
A PRELIMINARY STUDY
JEFFREY N . WHERRY, NICK PAAL, JOHN B. JOLLY,
BALKOZAR ADAM, CAROL HOLLOWAY,
BETTY EVERETT, AND LELA VAUGHT
Universiry oJ Arkansas for Medical Sciences
The discriminant and concurrent validity of the Gordon Diagnostic System (GDS)
was investigated in 29 youngsters categorized into “normals” or “ADHDs” ba
