Two clinical psychologists, Dr. Vance and Dr. Al-Jamil, independently assess a patient who presents with lethargy, social withdrawal, and feelings of worthlessness. Dr. Vance diagnoses the patient with Major Depressive Disorder, whereas Dr. Al-Jamil diagnoses them with Schizoid Personality Disorder.
Explain two reasons why diagnostic classification systems, such as the DSM or ICD, may lead to such inconsistent diagnoses.
110 exam-style questions on Edexcel A Level Psychology Content, covering Diagnosis of mental disorders (4 Ds), Classification systems (DSM and ICD), Schizophrenia and one other disorder, Treatments for the two disorders, Individual differences, and Developmental psychology. Each one has a worked solution and a mark scheme showing where the marks go.