Dr. Kovac conducted a study to investigate whether a 10-minute virtual reality (VR) forest walk reduces anxiety. He measured participants' anxiety levels before and after the VR experience using a self-report scale from 1 (completely calm) to 20 (extremely anxious). Dr. Kovac chose to use a Wilcoxon Signed-Ranks test to analyse his data.
State three reasons why Dr. Kovac would use a Wilcoxon Signed-Ranks test for this study.
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 questions, 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.