Dr. Vance is evaluating the effectiveness of a new wearable biofeedback device designed to reduce occupational stress among high-pressure financial traders. He recruited his sample of traders using a volunteer sampling technique by posting an invitation on an online forum for financial market analysts.
He allocated the volunteers to two conditions:
Explain one weakness of Dr. Vance using a volunteer sampling technique for this investigation.
57 exam-style questions on Edexcel A Level Psychology Research methods and skills, covering Research methods and skills. Each one has a worked solution and a mark scheme showing where the marks go.