Researchers used PET scans to measure mean blood flow during a speech task in adults diagnosed with schizophrenia and in a comparison group.
| Scan measurement | Diagnosed group | Comparison group |
|---|---|---|
| Mean frontal-lobe blood flow (mL per 100 g per minute) | 44 | 52 |
| Mean temporal-lobe blood flow (mL per 100 g per minute) | 61 | 50 |
State two differences shown by the scan data.
Using the scan data and your knowledge of brain function, explain one possible effect on perception in the diagnosed group.
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.