A clinical psychologist, Dr. Vance, wants to investigate whether a new virtual reality (VR) mindfulness therapy reduces anxiety levels in patients more effectively than standard audio-guided mindfulness. She recruits 24 participants with generalized anxiety disorder and randomly allocates 12 to the VR therapy group and 12 to the audio-guided group. After a 4-week program, each participant completes a self-report anxiety severity questionnaire, yielding a score from 1 to 50 (where higher scores indicate greater anxiety). The VR group had a median score of 18, and the audio-guided group had a median score of 29.
State which non-parametric statistical test Dr. Vance should use to analyse whether there is a significant difference in anxiety scores between the two groups.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.