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.
689 exam-style questions on AQA A Level Psychology Scientific processes. Each one has a worked solution and a mark scheme showing where the marks go.