Which sociological research method is likely to be the most difficult to replicate (repeat)?

Question

Quizplus · Accepted Answer

Participant observation involves the researcher immersing themselves in the social setting they are studying and actively participating in it. This can make it difficult to replicate as the researcher's subjective experiences and interactions with those being observed cannot necessarily be replicated by another researcher. Additionally, participant observation often involves building trust with those being observed, which can be difficult for a new researcher to establish.

Which Sociological Research Method Is Likely to Be the Most