The main purpose of this study was to examine whether adult patients with attention deficit hyperactivity disorder (ADHD) demonstrate sets of dysfunctional cognitive beliefs and behavioural tendencies according to Jeffrey Young's schema-focused therapy model. Sets of dysfunctional beliefs (maladaptive schemas) were assessed with the Young Schema Questionnaire (YSQ-S2) in 78 adult ADHD patients and 80 control subjects. Patients with ADHD scored significantly higher than the control group on almost all maladaptive schemas. The 'Failure', 'Defectiveness/Shame', 'Subjugation' and 'Emotional Deprivation' schemas were most pronounced in adult ADHD patients, while only 'Vulnerability to Harm or Illness' did not differ between the two groups. The schemas which were most pronounced in adult patients with ADHD correspond well with their learning histories and core symptoms. By demonstrating the existence of early maladaptive schemas in adults suffering from ADHD, this study suggests that schema theory may usefully be applied to adult ADHD therapy.
Keywords: Adult ADHD; Attention deficit hyperactivity disorder; Early maladaptive schemas; Young Schema Questionnaire.