An environmental researcher wants to study the correlation between local residents' engagement in pro-environmental behaviors and their support for a proposed community wind farm. The researcher places a flyer with a QR code on the public notice board of the town hall, inviting residents to complete an online questionnaire. Over the course of a week, 42 residents scan the code and submit their responses.
Identify the sampling method used by the researcher to obtain this sample.
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.