Dr. Mercer conducted an investigation into the effectiveness of systematic desensitisation for aviophobia (fear of flying) using a virtual reality simulator. To assess progress, she measured the heart rate (in beats per minute) of 12 participants at the start of each of the 8 stages of the anxiety hierarchy using a standardized, automated chest-strap heart rate monitor.
Explain one strength of Dr. Mercer's study in terms of reliability.
Practise Edexcel A Level Psychology Content with exam-style questions for A Level Psychology. 1,059 questions 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, 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.
