Table 1.

Interview schedule developed to explore situations in which grandparents use food treats with their grandchildren

Research objectives	Probes and prompts
Explore how grandparents describe and understand ‘core foods’ and ‘discretionary foods’	What types of foods do you feel are important for your grandchild to have every day? What kind of terms do you use to describe these foods? What about the foods that you feel your grandchild should eat less often? What kind of terms do you use to describe these foods? How would you describe a ‘treat’?
Understand if, how and why grandparents use food treats with their grandchildren	Thinking about some of the things we have called ‘treats’, can you describe some of the situations that you might provide these for your grandchild/ren? How do you feel about providing treats to your grandchild/ren?
Investigate any incongruence between grandparents’ beliefs and their practices regarding treats and explore the rationale they use to justify any tensions that arise	Do you have any rules regarding the use of ‘treats’? Can you describe a situation where you may have bent these rules a little bit? Can you tell me what happens when you bend these rules?