Researchers of the gifted have traditionally advanced the theory, though they are often without data to support it, that an association between intellectual and/or creative giftedness and mood disorders exists. This assumed association is often referred to as the "mad genius theory." This article explores the origins and development of…

In order to investigate unique and shared characteristics and to determine factors predictive of group classification, quantitative comparisons of behavioral and emotional problems were assessed using the Developmental Behavior Checklist (DBC-P) and the Vineland Adaptive Behavior Scales in autistic disorder, Williams syndrome (WS), and…