A number of diet-related quality of life measures exist; however, they are generally designed for specific groups (e.g., people with diabetes) or specific diets (e.g., low cholesterol diets), and/or they have not undergone comprehensive psychometric assessment and are not psychometrically robust. Psychometric testing is important as it allows for a large number of psychological variables to be researched. Consequently, a psychometrically robust tool is needed to measure diet-related quality of life across the full spectrum of “diet”.\
This project is based on understanding the effects of diet/eating habits on quality of life. In this case, diet refers to eating patterns and habits, intentional dietary changes, self-initiated diets or prescribed diets. The study is focused on further developing a Diet-Related Quality of Life measure. We hope to refine the measure to be more suitable for diverse populations. Questionnaire development and evaluation guidelines will inform measure development and evaluation.

We are inviting individuals of at least 18 years of age, living in Australia with online access and who can read and understand the English Language.\
The study is entirely online and made up of two questionnaires. The first questionnaire will require up to 75 minutes to complete, and the second one (completed in 2 weeks) will require up to 20 minutes.\
The main questionnaire asks about the impact of your diet and eating patterns on aspects of quality of life. Several other questionnaires are also included so we can explore the relationship between our new questionnaire and other related questionnaires already used in the research. These questionnaires will ask about dietary patterns, eating concerns, components of quality of life, shape concerns, weight concerns, self-efficacy, convenience, cost, self-care and social. We will also ask demographic questions such as age, gender, health, weight, height, etc.