Regulating Emotions and Behaviors After Brain Injury

Eligibility Criteria: \* (Limit: 15,000 characters) Summary criteria for participant selection. Main eligibility criteria GREMO patients : * Inclusion criteria: * Persons with acquired brain injury regardless of the type or location of the injury * Age between 18 and 68 * Over 18 months since the acquired brain injury (or 6 month if mild traumatic brain injury) * Challenging behaviors or emotional dysregulation or high level of anxiety / depression or family's complaints about emotional dysregulation * Secondary or exacerbated by an acquired brain injury * Causing important suffering for themselves or their families * Being affiliated to a social security * Fluent in French * Being able to understand goals and risks and to give a dated and signed consent * Exclusion criteria: * Clinically evident severe lack of insight, lack of abstract reasoning, or severe anosognosia * Patients without any complaints * Severe cognitive impairments, aphasia or intellectual impairments that doesn't allow to understand DBT skills, questionnaires or group intreactions * Non fluent in French * Associated brain degenerative disease * Cancerous brain injury with uncertain progression * Non-stabilized psychotic disorder * Following a third wave cognitive behavioral therapy during the research study (for example : acceptance and commitment therapy) Controls without brain injury * Inclusion criteria : * Being 18 years old or more * Without brain injury * Exclusion criteria : * Non fluent in French * History of brain injury or brain disease * History of psychiatric disorder * Personality disorder * GREMO patient's family member living together * Psychologist, neuropsychologist or people with an emotional regulation knowledge linked to their profession * Being under guardianship or curatorship * Being pregnant or breastfeeding GREMO patients' family members * Inclusion criteria : * Being 18 years old or more * GREMO patient's family member * Living with a GREMO patient * Agreeing to rate an emotion-behavior-skills diary cards * Exclusion criteria : * GREMO patient's refusal for their family member to participate * Non fluent in French * Brain injury or brain disease * Major lack of insight * Being under trusteeship or curatorship Qualitative research ABI patients and families * Inclusion criteria : * Person with ABI attending the same medico-social service as GREMO patients * Ineligible for GREMO patients group (participation refusal, major insight difficulty…) * Agreeing to talk about their free will or spirituality * Exclusion criteria : * Aphasia or dysarthria not allowing understandable recording * Impossibility to understand oral questions * Non fluent in French