An occupational psychologist conducted a study to investigate whether listening to a specific frequency of binaural beats affects the attention span of air traffic controllers. The controllers completed a standardized concentration test before listening to the audio track, and then completed an equivalent test immediately after listening to it. The psychologist analyzed the comparison using a sign test.
Explain why the psychologist decided that the sign test was an appropriate statistical test to use on the data from this study.
Practise AQA A Level Psychology Inferential testing (A-level only) with exam-style questions for A Level Psychology. 123 questions, matched to the AQA A Level Psychology (7182) 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.
