Dr. Aris conducted an investigation into the impact of blue-light-blocking glasses on subjective sleep quality among remote software developers at a major technology company.
Group 1 wore blue-light-blocking glasses during their evening screen use for two weeks, while Group 2 wore plain clear-lens glasses as a control. Both groups then rated their sleep quality on a scale of 1 to 10 each morning. Dr. Aris recruited his participants using a volunteer sampling technique.
Describe how Dr. Aris may have gathered his participants using a volunteer sampling technique.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.