The single-item Healthy Diet Scale: validity and reliability

The single-item Healthy Diet Scale (HDS) was developed to estimate the percentage of daily diet that consumers regard as healthy. The aim of the presented studies was to demonstrate its validity and reliability. To evaluate its validity, in Study 1, N = 108 Dutch young adults completed a survey including the HDS (with picture examples) and the multiple-item Start the Conversation diet scale (STC). To examine the reliability of the HDS, a same-day test-retest assessment was conducted. In Study...