Dr Vance is conducting a study into the relationship between caffeine consumption and attentiveness in university students. To select participants, he stands in the main foyer of the campus library at 9:00 AM on a Monday morning and asks the first 15 students who walk past to complete his survey.
Identify the sampling technique used by Dr Vance in his investigation.
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.