Dysfunctional chronic diffuse pain syndrome, concerning 2% of the French population, Fibromyalgia (FM) is classified either as a psychological disease or as a somatic disease. This dichotomous reasoning does not lead to a better understanding and does not allow the use or development of new psychological tools of care.

The issue of the proximity between FM and depression highlighted by some authors and the presence of anxious comorbidities may arise at a different level, that of the transdiagnostic approach. Rumination is one of these transdiagnostic processes that are the subject of recent studies and one of the dimensions of which (abstract analytical rumination) is at work in depression and a number of psychopathologies. The investigator therefore wishes to explore the process of rumination and its abstract analytical dimension in FM and to explore its link with the depressive and anxious manifestations frequently associated with this disorder.

Inclusion Criteria:

• FM Criteria of the American College of Rheumatology ACR 1990.
• Major Patients
• free and informed consent signed
• stable treatment for at least one month
• Native French speaker
• Patient covered by health insurance.

Exclusion Criteria:

• Patient deprived of liberty or protected major (under guardianship or curatorship)