Dr. Marcus investigated the effect of a cognitive restructuring intervention on pain tolerance, measured in seconds during a cold pressor task. He compared patients' pain tolerance times before and after the intervention. Using a Wilcoxon Signed-Ranks test to analyse the paired data, Dr. Marcus obtained a calculated/observed value of T=4T = 4T=4.
The critical value of T T\,T for a two-tailed hypothesis at the p≤0.05 p \leq 0.05\,p≤0.05 level of significance, where N=9N = 9N=9, is 5.
Determine whether Dr. Marcus's results were significant or not. Justify your answer.
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.
