Effects of Relaxing Breathing With Biofeedback or Meditative Stimulation on Performances During OSCE of Medical Students

This randomized, controlled, monocentric study will take place during mandatory rehearsal of Objective Structured Clinical Examination for third year medical student. For examination purpose, the students will be divided in four groups that will undergo identical exam in the same time in four parallels circuits. Before entering the circuit, all the students will received information for the study and sign consent. All the students will be equipped with emWAve® devices that allows us to collect heart rate variability as physiological stress marker during the time of the intervention. Participants will undergo short questionnaires regarding perceived stress. Then the groups of students will be randomized in four interventions groups for receiving a combination of intervention before and/or after the examination circuit. All the interventions last six minutes long. The randomisation groups are : * Relaxing breathing exercise coupled with biofeedback before the circuit, no intervention after * Meditative stimulation audio tape before the circuit, no intervention after * Standardised video as controlled group before the circuit and a relaxing breathing exercise coupled with biofeedback after * Standardised video as controlled group before and not intervention after At the end of the examination circuit, all the students will undergo short questionnaires regarding stress, participants will get equipped with emWAve ® devices again and participants will get the second intervention depending on the randomisation group. Main objective is to show that relaxing breathing exercise coupled with biofeedback or meditative stimulation is better than an standardised video on performance during OSCE. The main outcome is student grade at the exam, as determined by university evaluator who is blind to the intervention and with no links to the study. Secondary objectives are to compare the effects of the interventions on measured physiological stress, psychological stress, and negative rumination.