A sports psychologist investigates whether a mental imagery technique reduces performance anxiety in 24 heptathletes. He measures anxiety levels using a self-report rating scale both before and after a key competitive event. To analyse the difference in anxiety scores, the psychologist decides to perform a Wilcoxon signed-ranks test.
Which level of measurement and type of experimental design are required to use this statistical test?
nominal level data and a repeated measures design
ordinal level data and an independent measures design
nominal level data and an independent measures design
ordinal level data and a repeated measures design
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.