TABLE 1.

Semistructured interview script

Questions about the Journal	Questions about the Plate Tool
Attitudes	Attitudes
•What did you like about the 3-day food journal?	•What did you like about the plate-based tool?
•What did you dislike about the 3-day food journal?	•What did you dislike about the plate-based tool?
•What were the barriers associated with using this tool?	•What were the barriers associated with using this tool?
Subjective norms	Subjective norms
•How did you feel about having to count your portions and fill out this tool throughout the day?	•How did you feel about having to record the proportions on your plate and fill out this tool throughout the day?
Perceived behavioral control	Perceived behavioral control
•What makes it easy to use the 3-day food journal?	•What makes it easy to use the plate-based tool?
•What makes it difficult to use the 3-day food journal?	•What makes it difficult to use the plate-based tool?
Intention	Intention
•How would you feel about using the 3-day food journal to track your diet in the future?	•How would you feel about using the plate-based tool to track your diet in the future?
Perceived benefits	Perceived benefits
•To what extent do you feel that the 3-day food journal would help you maintain a healthier diet?	•To what extent do you feel that the plate-based tool would help you have a healthier diet?
•How do you think the 3-day food journal could help you have a healthier diet?	•How do you think the plate-based tool could help you have a healthier diet?
Overall questions
•Which method of self-monitoring did you prefer and why?
•Which tool would you see yourself using over time to make dietary changes?