Gifted children and adolescents can display behavioral characteristics similar to those exhibited by children and adolescents who have been diagnosed with attention-deficit hyperactivity disorder (ADHD), leading to potential issues with misdiagnosis. The overlapping characteristics between giftedness and ADHD are often seen as anecdotal or to only exist in theory, such as that explained by Dabrowski's theory of positive disintegration and his notion of overexcitabilities. There is a paucity of empirical data to support this perceived relationship between ADHD and overexcitabilities. This study provides empirical support for a relationship between ADHD and overexcitabilities within a sample of gifted adolescents. Implications are discussed. (Contains 2 tables.)