Table 1.

Sample questions asked in semistructured telephone interviews with parents about mobile device use, context, and content.

Overarching question	Probes
If you think about the last day or so, when did your child use a smartphone or tablet throughout the day?	Where do they use the mobile device? (inside the home, outside the home); Was this a typical day?; How did this use compare to a weekend day?
What are the main factors influencing when or how long your child uses a smartphone or tablet?	Does it depend on any of the following: who is supervising them, family schedule, weather?
What are some benefits of your child using a smartphone or tablet?	What are the benefits to you?; What are the benefits to your child?
Some parents have rules about how their child can use a smartphone or tablet. Other families do not. Do you or your family have any rules about how your child can use the smartphone or tablet?	If so, how or why did you come up with this rule?; If so, how well do these rules work?
Please tell me if there are any times or reasons that you encourage your child to use a smartphone or tablet?	Are there any specific places, situations, or times during the day that you encourage them to use a mobile device?; How easy or hard is it to encourage your child to use a mobile device?
Please tell me if there are any times or reasons that you discourage your child to use a smartphone or tablet?	Are there any specific places, situations, or times during the day that you discourage them to use a mobile device?; How easy or hard is it to discourage your child to use a mobile device?