A researcher investigated the relationship between sleep hygiene and academic focus. Participants were asked to complete a self-report sleep quality questionnaire in a busy university cafeteria during their lunch break. The questionnaire consisted of 10 open-ended questions about their nightly routines. The researcher administered the questionnaires over a three-week period at various times of the afternoon, sometimes when the cafeteria was exceptionally loud and other times when it was relatively quiet.
Identify and explain two factors that could have affected the reliability of the data collected in this study.
201 exam-style questions on OCR A Level Psychology Planning and conducting research. Each one has a worked solution and a mark scheme showing where the marks go.