A Level Psychology OCR Test 2026 – 400 Free Practice Questions to Pass the Exam

Bocchiaro utilized volunteer sampling in his study, which is characterized by participants self-selecting into the study, usually in response to an advertisement. This method is effective in behavioral research where individuals are more inclined to participate if they have an interest or a prior inclination to engage with the research topic.

In Bocchiaro's study, which focused on obedience and whistleblowing, participants voluntarily chose to take part, allowing the researcher to access a group that was both available and willing to express their opinions on ethical dilemmas. This approach can lead to a more engaged participant pool, which helps ensure that the data collected reflects genuine responses and diverse viewpoints.

Other sampling methods mentioned, such as random sampling, would involve selecting participants from a larger population in a way that every individual has an equal chance of being chosen. This is less applicable in this context since Bocchiaro wanted a specific type of participant engagement. Stratified sampling would involve dividing the population into subgroups and ensuring representation from each, which was not a focus of Bocchiaro's methodology. Systematic sampling involves selecting participants at regular intervals from a list, which also does not fit the approach taken in Bocchiaro's research.