Excess alcohol consumption Not Applicable
Conditions
Interventions
Participants will be randomly assigned to one of six conditions in an experiment with a between-subjects 3 (HWL: image-and-text HWL, ii. text-only HWL, iii. no HWL) x 2 (calorie information: present v
Sponsors
University of Cambridge
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Aged 18 years or over 2. Current Tesco online customer 3. Regularly consume alcohol – beer, cider and/or wine (i.e., at least once a week) 4. Regularly purchase alcohol – beer, cider and/or wine – online at Tesco (i.e., at least once a month, minimum £20 monthly spend on these drinks) 5. Willing to select drinks from 64 options, shown in an online task, to purchase in next online shop at Tesco (note: options will include different brands of beer, cider, wine, alcohol-free beer, alcohol-free cider, alcohol-free wine and soft drinks available at Tesco; no additional drinks from these categories should be added to the Tesco shop) 6. Willing to complete online shop at Tesco, book a delivery (or Click and Collect) slot, and send the details to the research team within 48 hours of the drink selection task 7. Willing to send proof of purchase (i.e., itemised receipt) to the research team within 48 hours of delivery or collection date 8. Have a Tesco delivery or collection address in England or Wales 9. Able to complete study on a computer or tablet (not mobile phone)
Exclusion criteria
Exclusion criteria: Does not meet the inclusion criteria
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Number of alcohol units selected (with an intention to purchase). Participants will be aware that they will be required to purchase the drink items chosen in the selection task and send proof of this to the research team. Therefore, the primary outcome of selection will be made in the context of intention to purchase and participants will provide evidence of this behaviour. Units of alcohol – a measure of pure alcohol in a drink with one unit being 10 ml or 8 g of pure alcohol - will be calculated for all drinks that are >0% ABV (i.e. alcoholic and alcohol-free drinks). | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. Number of alcoholic drinks selected, calculated from the selection task data immediately, i.e. whilst participants are exposed to the labelling intervention 2. Number of non-alcoholic drinks selected, calculated from the selection task data immediately, i.e. whilst participants are exposed to the labelling intervention 3. Total number of drinks selected, calculated from the selection task data immediately, i.e. whilst participants are exposed to the labelling intervention 4. Proportion of total drinks selected that are alcoholic, calculated by dividing the number of alcoholic drinks selected by the total number of drinks immediately, i.e. whilst participants are exposed to the labelling intervention 5. Number of alcohol units purchased, calculated from the purchasing data (i.e. from proof of purchase) immediately after the selection task 6. Number of alcoholic drinks purchased, calculated from the purchasing data (i.e. from proof of purchase) immediately after the selection task 7. Number of non-alcoholic drinks purchased, calculated from the purchasing data (i.e. from proof of purchase) immediately after the selection task 8. Total number of drinks purchased, calculated from the purchasing data (i.e. from proof of purchase) immediately after the selection task 9. Proportion of total drinks purchased that are alcoholic, calculated by dividing the number of alcoholic drinks purchased by the total number of drinks immediately after the selection task | — |
Countries
England, United Kingdom
Outcome results
None listed