A researcher used PET scans while two groups of adults completed a route-planning task. On each trial, a road became unavailable, so participants had to select a different route.
| Group | Mean frontal-lobe blood flow during the task (mL per 100 g of brain tissue per minute) | Mean number of route-planning errors |
|---|---|---|
| Diagnosed with schizophrenia | 46 | 7.6 |
| No schizophrenia diagnosis | 52 | 3.2 |
Using the source, explain what the results suggest about the link between frontal-lobe activity and task performance in schizophrenia.
Explain one limitation of drawing a cause-and-effect conclusion from these results.
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.