AO3

• A limitation of the interactionist approach is that schizophrenia is more commonly diagnosed in urban than rural areas. This may support the interactionist position that urban living is a stressor, but schizophrenia may be simply more likely to be noticed in cities. people with a diathesis for schizophrenia may migrate to cities. On balance, the greater chances of diagnosis in cities is not strong enough support for the interactionist position.
• real-life applications. Tarrier et al. found that treating schizophrenia with a combination of treatments Medication and CBT leads to a better reduction in symptoms of schizophrenia as in comparison to just taking medication only. Reduces the severity of symptoms a lot more than medication alone. However, other research suggests this argument is the same as claiming that because alcohol reduces shyness, shyness is caused by a lack of alcohol. Alcohol is the treatment causation fallacy.
• A limitation is that there is some dispute over how simple the original diathesis stress model is. For example, researchers found that schizophrenia is aetiologically heterogeneous And therefore, there is no single schizogene. It can now be believed that vulnerability can be as a result of early trauma, and stress can come in many forms, including biological. This is a weakness of the original diathesis stress model, as research suggests that it is incorrect. The old model states that there is a single schizogene, and all stresses are psychological. However, the newer model accounts for this.
• evidence to support the role of vulnerability and stress in the development of schizophrenia. Tienari et al. investigated the combination of genetic vulnerability and parenting style. Children adopted from 19,000 Finnish mothers with schizophrenia between 1960 and 1979 were followed up. Assessed for child-rearing style and rates of schizophrenia were compared to a control group of adoptees with no genetic risk. Both groups of children experienced family-related stress but only the children with a genetic risk developed having schizophrenia.