Two people experience the same frightening event, but only one later develops PTSD. A psychologist compares their stress hormone levels and whether close family members have had PTSD.
Explain why this investigation is testing a biological explanation of PTSD.
103 exam-style questions on Oxford AQA IGCSE Psychology 2.3 Mental health, covering 2.3.1 Incidence of mental health problems over time, 2.3.2 Characteristics of mental health, 2.3.3 Cultural variations in beliefs, 2.3.4 Challenges of modern living, 2.3.5 Recognition and social stigma, 2.3.6 Individual effects of mental health problems, 2.3.7 Social effects of mental health problems, 2.3.8 Diagnosing OCD, 2.3.9 Explanations of OCD, 2.3.10 Therapy for OCD, 2.3.11 Kearns's CBT study, 2.3.12 Diagnosing PTSD, 2.3.13 Explanations of PTSD, 2.3.14 Therapy for PTSD, and 2.3.15 Eftekhari's exposure therapy study. Each one has a worked solution and a mark scheme showing where the marks go.