The iatrogenic or sociocognitive model (SCM) of DID says it is created during psychotherapy when the therapist creates false memories and patients become convinced they have multiple personalities. Some patients may be more likely to develop DID in these circumstances because they are naturally more likely to accept their therapists are right about DID. SCM supporters also think that patients have seen DID in movies and books, and this shows them how people with DID are supposed to behave, which makes it easier for them to change their behavior when they are supposed to be a new alter. They also say the criteria used by the DSM are unclear which makes it hard to agree whether a patient has DID or another diagnosis.