Evaluation questionnaire, focus group and interviewer evaluation
All participants completed a short dietary assessment evaluation questionnaire containing fourteen questions with closed and open answer categories at CV3. A focus group was conducted by a member of the research team with training and experience in qualitative research 2 weeks after the study was completed. The focus group was conducted to get more insight into participants’ experiences with, and reactions to, the data collection tools used in the study. The focus group consisted of three males and three females between 18 and 60 years with different educational levels, and who completed both methods. The aim of the questionnaire and the focus group was to learn more about factors that influenced the reported food intake. Both the questionnaire and the focus group focused on the same aspects of the dietary assessment with the two methods:Food reporting: remembering items, willingness to report, change of eating habits and satisfaction with detail levelAdequacy and ease of portion size estimationParticipant burdenWhich method reflected dietary habits bestThe focus groups were taped, transcribed, themed and synthesised.All interviewers attended an evaluation meeting. The meeting was based on a set of questions that provided a base for discussing the interviewers’ challenges and experiences of the AMPM interviewer system and the interviews themselves with the participants. The interviewers’ answers and remarks were noted by three people. The answers were thereafter transcribed, themed and synthesised.