Process evaluation design in a cluster randomised controlled childhood obesity prevention trial: the WAVES study

Table 1 Summary of research questions assessed in the WAVES study intervention process evaluation

Research question	Process evaluation dimensions	Data source
Is the intervention being delivered in the way it was intended?	Fidelity¹ / Adherence²	Observations
		Logbooks
		Qualitative evaluation
		Questionnaires
How much exposure are children and families getting to each intervention component?	Reach¹/ Dose delivered¹ /Dose recieved¹/Exposure²	Observations
		Logbooks
		Qualitative evaluation
		Questionnaires
What methods are used for encouraging participation in intervention activities?	Recruitment¹	Observation
	Recruitment¹	Qualitative evaluation
What quality of intervention is being received?	Quality²	Observations
What quality of intervention is being received?	Quality²	Logbooks
How well are children and families responding to, and engaging with, the intervention?	Dose received¹ / Participant responsiveness²	Observations
		Logbooks
		Qualitative evaluation
Are there intervention components which are more essential than others?	Programme differentiation²	Observations
		Logbooks
		Qualitative evaluation
		Questionnaires
Are there contextual and environmental factors which have the potential to influence delivery?	Context¹	Observations
		Qualitative evaluation
		Questionnaires
		Research team reflection

1 Based on Process evaluation components outlined by Baranowski and Stables [8] & Linnan and Steckler [7].
2 Based on implementation fidelity components outlined by Dane and Schneider [11].

ISSN: 1479-5868