Table 1.

PICO^a framework search strategy for MOOC^b evaluation methods.

Search categories	Sample search terms to screen within electronic databases
Phenomenon of interest	MOOC* OR “massive open online course” OR coursera OR edX OR odl OR Udacity OR futurelearn
Intervention	Evaluat* OR measur* OR compar* OR analys* OR report* OR assess*
Comparator	Method*
Outcome	Knowledge OR “applicable knowledge” OR retent* OR impact OR quality OR improv* OR environment OR effect

^aPICO: population, intervention, comparator, and outcome.

^bMOOC: massive open online course.