A cognitive psychologist wants to determine whether a new mnemonic technique improves recall. A sample of 15 participants is asked to recall a list of words before learning the technique, and then a different but equivalent list of words after learning the technique. The recall scores (out of 30, treated as ordinal data) are compared.
Which of the following inferential statistical tests is the most appropriate to analyse this data?
Mann-Whitney U test
Related t-test
Wilcoxon Signed Ranks test
Sign test
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.