The main objective of this study is to establish whether there are differences in self-recognition and self/other distinction in subjects with psychological vulnerability compared to healthy volunteer controls.

This study is based on the properties of the double mirror "Alter Ego" which is a device that appears as a double-sided mirror surrounded by light diodes whose intensity can be varied. Thanks to this variation of luminosity, this special paradigm creates morphs between two real subjects seated on both sides, resulting in different faces, each morphed to a varying extent.

In this task, participants watch a double mirror in which a picture of their own face gradually transforms into the face of an unfamiliar other (self-to-other direction) or vice versa (other-to-self direction), and indicate at which point they judge the morph to look more like the target face than the starting face.

The comparison of the thresholds obtained by different individuals makes it possible to establish whether there could be differences between subjects with psychological vulnerability and healthy controls and to explore hypothetical links between self/other distinction abilities and symptoms of psychological vulnerability .

Inclusion criteria for patients:

• Aged from 15 to 25 years
• Subject meeting the Ultra High Risk criteria at CAARMS and / or SPI-A
• Signature of the consent (participants and parents for minors)
• Subject affiliated to the social security scheme or benefiting from such a scheme

Inclusion criteria for healthy volunteers:

• Aged from 15 to 25 years
• Subject not familiar to the patient to whom it is matched
• Signature of the consent (participants and parents for minors)
• Subject affiliated to the social security scheme or benefiting from such a scheme

Exclusion Criteria for both patients and healthy volunteers:

• History of epilepsy and / or migraine (due to the epileptogenic potential of light stimuli)
• Refusal of participation of the minor even if the legal representatives want the subject to participate in the study
• Claustrophobia
• Wearing glasses
• Abnormal right and left visual acuity without contact lenses
• Distinctive signs on the face which cannot be temporarily removed
• Subject under legal protection (curators / guardianship) or deprived of liberty

All collected data that underlie results in a publication

Data will be available after the publication of result and ending fifteen years following the last visit of the last patient

Data access requests will be reviewed by the internal committee of Brest University Hospital (UH). Requestors will be required to sign and complete a data access agreement.