Study of the Test-retest Reliability of the Neuropsychiatric Fluctuations Scale in Parkinson's Disease

This study focuses on neuropsychiatric fluctuations (NPF) in Parkinson's disease. Due to the lack of specific assessment tools, we developed the Neuropsychological Fluctuations Scale (NFS), a 20-item questionnaire. Recent studies have confirmed its reliability, sensitivity, and validity. To finalize its validation, assessing its test-retest reliability is an essential next step.

Inclusion Criteria: Age \> 30 and ≤ 75 years * Idiopathic Parkinson's disease (according to the criteria of the Movement Disorders Society) * Presence of motor fluctuations described by the patient, their relatives, or identified by the clinician * Stability of antiparkinsonian treatment for at least one month * Mastery of the French language * Able to give consent. * Affiliated to the social security system Exclusion Criteria: Parkinsonian syndrome other than idiopathic Parkinson's disease * Dementia (MoCa \< 23) * No antiparkinsonian treatment or treatment modified for less than one month * Persons referred to in Articles L1121-5 to L1121-8 of the CSP (corresponds to all protected persons: pregnant women, parturients, breastfeeding mothers, persons deprived of liberty by judicial or administrative decision, persons receiving psychiatric care under Articles L. 3212-1 and L. 3213-1 who are not covered by the provisions of Article L. 1121-8, persons admitted to a health or social establishment for purposes other than research, minors, persons subject to a legal protection measure or unable to express their consent)) * Subject in a period of exclusion from another interventional study.