| DSM-IV 297.3 Shared Psychotic Disorder (Folie à deux) |
| A. A delusion that arises in a person in the context of close relationships with other people, or some people, with pre-existing delusions |
| B. Similar delusions relate to their contents with people who already have this delusion |
| C. Disorders are not better calculated by other psychotic disorders (for example, schizophrenia) or mood disorders with psychotic features and not due to direct physiological effects of substances (for example, substance abuse and drugs) or general medical conditions |
| ICD-10 F.24. Induced Delusional Disorder (Folie à deux) |
| A. Two people share the same delusion or delusional system and support each other in this belief |
| B. They have a very close relationship |
| C. There is temporal or contextual evidence that delusion is induced in passive individuals through contact with active individuals |
