Feasibility and Efficacy of Cognitive-Behavioral Therapy for Patients With ADHD/Behavioral Addiction Comorbidity

Inclusion Criteria: * Patient over 18 (age ≥ 18 years) * Patient treated in an outpatient addictology department at the CHU of Brest, Nantes or Tours and presenting an ADHD/behavioral addiction comorbidity * Patient affiliated to a social security scheme * For patients treated with methylphenidate: no change in treatment dosage during the previous three months. * For patients not treated with methylphenidate: no introduction of methylphenidate within the next three months. Exclusion Criteria: * Patients with psychotic disorders (assessed by clinician) * Pregnant or breast-feeding women * Patients under protective supervision (guardianship or curatorship) * Persons under court protection * Persons deprived of their liberty * Patients who do not meet the eligibility criteria for CBT (e.g., cognitive impairment, hearing impairment). * Physical inability to participate in CBT sessions (e.g., lack of telephone, foreseeable unavailability). * Difficulty understanding self-questionnaires, including illiteracy. * Participation in another interventional research protocol involving another psychotherapeutic or pharmacological intervention that may have an impact on clinical outcome.