Researchers compared adults diagnosed with schizophrenia between the ages of 18 and 24 with siblings who had grown up in the same household but had not been diagnosed. The researchers used records from when each person was aged 30. Income figures were adjusted to the same year's prices.
| Measure at age 30 | Adults diagnosed with schizophrenia | Siblings not diagnosed with schizophrenia |
|---|---|---|
| Mean annual income | £15,400 | £29,100 |
| People without secure housing | 36% | 8% |
Using both measures in the table, explain how the findings support social drift theory and why they do not prove that social drift caused the pattern.
144 exam-style questions on OCR GCSE Psychology 3.2 Theories/Explanations, covering 3.2.1 Clinical characteristics of schizophrenia, 3.2.2 Key statistics of schizophrenia, 3.2.3 Dopamine hypothesis of schizophrenia, 3.2.4 Brain structure and function in schizophrenia; criticisms, 3.2.5 Social drift theory of schizophrenia, 3.2.6 Schizophrenia research study: Daniel et al. (1991), 3.2.7 Clinical characteristics of clinical depression, 3.2.8 Key statistics of clinical depression, 3.2.9 Social rank theory of clinical depression, 3.2.10 ABC Model of clinical depression, and 3.2.11 Clinical Depression research study: Tandoc et al. (2015). Each one has a worked solution and a mark scheme showing where the marks go.