Despite their historical importance in family therapy (Haley, 1980), systemic research and practices with young adults with a first onset of psychotic disorders are somewhat sparse. In this field, family psychoeducation is a widespread approach. A more reflexive stance (named “Open Dialogue”) has more recently been promoted in family therapy. The objective of this study examining cases was to investigate the possibilities of implementation of a specific reflexive interview technique (Tettamanti et al., 2019) within family sessions of our Young Adults Psychiatry Unit (i.e. specialized unit for early recognition and treatment of mental illness). Reflexive interview was done by a trained family therapist during family sessions. He asked questions first to clinicians then to family about previous meetings. RI tries to promote a more « open dialogue » through a less expert and directive therapeutic position. Reflexive interview invites co-construction and reciprocity during collaboration with families. Quantitative and qualitative feedback (i.e. mixed method study) on usefulness of interview was collected from each family member and from participating clinical staff after the interview. Preliminary results on three case studies showed a beneficial effect of reflexive interview techniques that contributed to place clinicians in a more reflexive stance. Of note, family members underlined positive change in clinician’s interactions after interviews but clinicians tended to neglect this component. Families especially valued positive changes in their relation with medical staff. Also, parents especially underlined positive changes in quality of relationship between medical staff. This effect was very scarcely mentioned by medical staff who tend to note changes in family systems and the new topics mentioned.