A determination would need to be made about the age at which a child is able to accurately report, and the best proxy reporter for children at younger ages. It may be, for instance, that for children age 5 and younger, parent report is most appropriate, or it may be that an older sibling or other primary caregiver is the best reporter, depending on who spends most time on, or is most responsible for, the focal child's feeding. This approach would be most expensive, and would involve implementation challenges related to parental consent, protection of child privacy, and the interviewer skills necessary to survey younger children.