====== Research method ======

A research method is a strategy used to implement that plan.

Which research method should I choose?

Observation / Participant Observation.

Surveys.

Interviews.

Focus Groups.

Experiments.

Secondary Data Analysis / Archival Study.

Mixed Methods (combination of some of the above)
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Stefani A, Iranzo A, Sixel-Döring F, Videnovic A, Santamaria J, Trenkwalder C,
Högl B. Need for a consensus on definitions and on research methods in RBD and
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10.1093/sleep/zsz057. PubMed PMID: 31091537.