Table 2.

Overview of data sources

PT element	Dimension	Individual interview		Focus group with volunteers	Discussion with key informants	Observation	Document review
		Volunteers	Programme managers
Outcomes	Volunteer retention Task performance Organisational citizenship Behaviour Well-being	X	X	X	X		X
Intermediary outcomes	Motivation Intention to quit Absenteeism	X	X	X	X		X
Intervention	Management activities and practices	X	X	X	X	X	X
Mechanisms	Competence Autonomy Relatedness Mission valence	X		X
Context	Organisational context at branch level	X	X	X		X	X
	Organisational context at national level (URCS)				X	X	X
	Country context				X	X	X

PT, programme theory; URCS, Uganda Red Cross Society.