Researchers measured the percentage of participants who ultimately chose the vegetarian lunch. When the form preselected meat, 2–12.5% chose vegetarian. When the form preselected vegetarian, 86–89% chose vegetarian. Participants in both groups could freely change the meal before submitting the form.
Participants who chose the vegetarian lunch
Meat preselected: 2–12.5%. Vegetarian preselected: 86–89%.
Why the preselection mattered
Participants could change meals. Many still kept the meal that the form had preselected.
A preselected meal can look like the normal option or the organizer’s recommendation. Switching also requires participants to compare the meals and actively change the form.
The experiment does not show that participants lacked preferences. It shows that the registration form influenced how those preferences became a submitted choice.
Do not overgeneralize
The conference results do not predict what every cafeteria customer will choose.
The three experiments covered 330 choices at conferences in Copenhagen. Lunch was free, and most participants were highly educated Danish adults. Price, taste, religion, allergies and availability can change the result in other settings.
The study supports a narrower lesson: when people face the same options, a form’s preselected choice can influence what they submit.
How to use this research
When a choice feels automatic, inspect what the screen or shelf presented first.
A delivery app’s first restaurant, a preselected order bundle and a product beside the register all shape the starting point. When you review a choice, note both what you picked and what the environment showed first.
To test the idea on yourself, change one starting point for one week. Put a preferred breakfast where it is easy to reach, or decide on two delivery options before opening the app. Then observe whether choosing feels easier.
Designers have a separate responsibility. They should make alternatives visible and should not add penalties or unnecessary steps to switching. In Experiment C, 85% of surveyed attendees approved of the intervention, but approval does not justify every use of a preselected option.
How MorselFlow fits
MorselFlow’s default is to begin with a photo.
A meal log that asks for every nutrient first creates a heavy starting point. MorselFlow begins with a photo and suggests possible foods and portions.
MorselFlow does not treat those suggestions as facts. You can review and correct them before saving the meal.
This article explains research and statistics for a general audience. It is not medical diagnosis, treatment or individualized nutrition advice. Results depend on the participants and conditions and do not guarantee the same outcome for everyone.