Dr. Kenji conducted an investigation to evaluate the efficacy of a virtual reality (VR) graded exposure therapy program ('VirtuFear-Cope') for military veterans diagnosed with Post-Traumatic Stress Disorder (PTSD). He recruited a self-selected sample of 12 veterans from a single specialist clinic and assessed their PTSD symptom severity using a self-report rating scale before and after they completed six weekly VR sessions. His statistical analysis indicated a significant reduction in PTSD symptoms.
Explain one improvement Dr. Kenji could make to the design of his investigation.
Practise Edexcel A Level Psychology Research methods and skills with exam-style questions for A Level Psychology. 657 questions covering Research methods and skills, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
