Vegetable sales Nutritional, Metabolic, Endocrine Vegetable sales
Conditions
Interventions
The intervention consisted of three green inlays, indicating the space where customers can place their vegetables, each with a different social norm message about vegetable purchases of other customer
Sponsors
Vrije Universiteit Amsterdam
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: Supermarket customers in Amsterdam with a shopping trolley and a cash receipt
Exclusion criteria
Exclusion criteria: 1. Not willing to consent to having photograph of cash receipt taken 2. Purchased groceries for more than 12 persons for one day
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Vegetables purchased (in grams and in items), assessed at the end of each study day over the two-week study period using: 1. Examination of cash receipts 2. Surveys with customers after they had paid for their groceries | — |
Secondary
| Measure | Time frame |
|---|---|
| The following were assessed using oral surveys in the supermarket after customers had paid for their groceries over the two-week study period: 1. Customer characteristics: 1.1. Sex 1.2. Age category 1.3. Highest obtained education 2. Customer grocery behaviour characteristics: 2.1. Number of persons and days for which groceries were purchases 2.2. Use of a shopping list or not 2.3. Place customers purchased vegetables most often 2.4. If customers thought that they purchased less, more or the same amount of vegetables during this shopping trip as they usually would | — |
Countries
Netherlands
Outcome results
None listed