Milgram (1963) recruited his sample of 40 male participants using a newspaper advertisement, which is an example of self-selected (volunteer) sampling.
Explain one strength of using this sampling technique in his study of obedience.
128 exam-style questions on OCR A Level Psychology Responses to people in authority, covering Milgram (1963): Obedience and Bocchiaro et al. (2012): Disobedience and whistle-blowing. Each one has a worked solution and a mark scheme showing where the marks go.