About the study:

When we eat and sleep, can alter our health, and we are interested in understanding the association between these two factors. As individuals, we may prefer to sleep early (lark) or late (owl) and this is known as our chronotype. Chrononutrition is the study of how nutrition relates to your body’s  internal clock.

We have created a Chrononutrition Questionnaire that captures an individual’s patterns of eating during the day/night, in relation to their chronotype. To ensure that this questionnaire captures accurate information about your food and sleep habits we need to test it against validated sleep, work, and food questionnaires over a 2-week period. This will help us to see how reliable our new Chrononutrition Questionnaire is.

What it involves:

You will be required to attend two Zoom sessions with a researcher on 2 occasions over a 2-week period. You will need to have access to Internet and a desktop computer, laptop, or tablet.

At your first Zoom session, we will collect information about your height and weight, ask you to fill in a Chrononutrition Questionnaire, and provide you with materials and instructions on how to fill in a 7-day food diary, 14-day sleep diary, and 14-day work/study diary electronically.

Your second Zoom session will take place two weeks later. At this visit, you will return the diaries electronically and fill in the Chrononutrition Questionnaire again.


You are eligible for the study if you are:

  • aged 18 years or older
  • able to read and write English.

Further eligibility will also be assessed after completing an eligibility survey


Upon completion of the study, you will be entered into a prize draw to win one of three $100 Coles vouchers. At the end of this study, you may request to receive a personalised report of your chronotype and temporal patterns of eating in relation to the entire study population.

At the same time, you will be contributing greatly to the scientific knowledge of chrononutrition. The questionnaire will allow temporal meal patterns and chronotype to be conveniently captured in a standardised manner. It will allow us to better understand how meal timings affect our health.

Getting involved:

To obtain more information about the study and to complete an eligibility survey, please click on the link below:

More information


This project has been approved by the University of South Australia’s Human Research Ethics Committee Ethics Protocol 203281