The investigators will recruit 10 female patients with borderline personnality disorder and 10 controls with no psychiatric diagnosis, aged between 18 and 25 years old.~salivary cortisol daily curve ( 6 measures during the day) will be measured in participant's naturalistic environnement, together with salivary oxytocin. In addition, salivary oxytocin and cortisol will be measured during a psychosocial stress task and recovery.
This study aims to determine the feasibility and preliminary data on the interaction between oxytocin and cortisol during stress in borderline personnality disorder.