The goal of this study is to validate the virtual version of the Multiple Errands Test (V-MET) as a tool for assessing executive functions in patients with alcohol use disorder (AUD).

More specifically, the project aims to:

1. evaluate if the performance in the virtual version of the test is related to the performance in the original test in patients with AUD.
2. establish whether the virtual version of the test is sensitive enough to detect patients with or without an executive function deficit.

All participants will perform the original version (in a real-life supermarket) and the virtual version of the test (in a virtual reality environment).

Performance in the two versions of the test will be compared. Participants will also complete a battery of neuropsychological tests and questionnaires.

The project aims to validate the virtual version of the Multiple Errands Test (V-MET) as a tool for assessing executive function in patients with alcohol use disorder (AUD), in comparison to the original test (MET), by:

1. establishing the ecological validity of the V-MET: a high correlation between performance on the MET and performance on the V-MET (total number of errors) in patients with TUAL and executive dysfunction.
2. establishing the sensitivity of the V-MET (to executive dysfunction): significant difference between V-MET performance in patients with an AUD and executive dysfunction versus (a) patients without executive dysfunction and (b) "healthy" volunteers

Inclusion Criteria:

• written consent
• Normal or corrected vision and hearing
• Membership or entitlement to a social security plan
• spoken and written French
• third party liability insurance

for patients only :

• at least 6 criteria for AUD based on the Diagnostic and statistical manual of mental disorders
• At the end of withdrawal: treatment with a diazepam equivalent of ≤ 20 mg/day

Exclusion Criteria:

• under tutorship/ judicial protection
• Sensory or motor impairment (impeding the use of virtual reality and/or mobility)
• Severe neurological disorder (such as dementia or Korsakoff's syndrome)
• Photosensitive epilepsy (contraindication for the use of virtual reality)
• Any other condition deemed incompatible with the study, at the investigator's discretion
• Montreal Cognitive Assessment (MoCA) score < 10 (severe cognitive impairment)
• Breastfeeding or pregnant women
• Familiarity with the supermarket visited during the MET test

For controls only :

• History of alcohol use disorder
• score ≥ 8 on the Alcohol Use Disorders Identification Test
• Score on the Frontal Assessment Battery < 16 (or < 15 if education is below secondary level)

Individual participant data (IPD) underlying the results reported in this study might be shared, including de-identified demographic data, baseline characteristics, outcome measures, and variables necessary to reproduce the analyses. All data will be fully anonymized to protect participant confidentiality. A data dictionary and relevant metadata might also be provided to facilitate interpretation and reuse.

The analytic code will be provided at the time of publication of the primary study results. De-identified IPD will be shared via an open science repository such as Open Science Framework and may also be made available upon request.

Data and supporting documents will be available beginning at the time of publication of the primary results

Data will be made openly available