FOLIE A QUATRE By N., Pam M.S. - May 11, 2013 another shared psychotic disorder that affects 4 members of the same family. The delusions are identical or similar. French tine for insanity of four. FOLIE A QUATRE: "Folie a quatre is a French term for a shared disorder." Related Psychology Terms FOLIE A CINQ FOLIE A TROIS FOLIE A DEUX DELUSIONAL DISORDER SUBSTANCE-INDUCED PSYCHOTIC DISORDER UNDIFFERENTIATED SCHIZOPHRENIA CYCLOID PSYCHOSIS PARANOIA TWIN STUDIES PARANOID PSYCHOSIS Cite this page: N., Pam M.S., "FOLIE A QUATRE," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/folie-a-quatre/ (accessed August 7, 2020).