A clinical psychologist conducts a study to compare the effectiveness of two different cognitive reappraisal training programs (Program M M\,M and Program NNN) for reducing public speaking anxiety in corporate employees. The researcher uses a matched-pairs design where participants are matched on their baseline heart rate elevation during a brief mock presentation.
Identify one other participant variable for which the psychologist could have matched the participants. Explain how this variable could act as a confounding variable if it was not controlled.
Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 100 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.