Your surroundings shape your habits, even though the famous small-plate trick didn’t hold up

Key takeaways

• In a two-year study at Massachusetts General Hospital, color labels plus moving healthier items to eye level cut regular employees’ share of sugary “red” drink purchases from 23% to 14%.
• A 2019 Cochrane review of 24 trials found that placing food farther away reduced how much people ate, though the evidence is low certainty and mostly comes from labs.
• Two preregistered trials, published in 2019 and 2024, found that smaller plates made little or no difference in how much people ate.
• Cornell University found in September 2018 that food researcher Brian Wansink committed academic misconduct, and by that December, Retraction Watch counted 17 of his papers retracted.
• Start at home with three moves: keep the food you want to eat in sight, put the food you don’t want out of reach, and set up easy defaults.

In 2007, a Cornell University food scientist won an Ig Nobel Prize, a tongue-in-cheek award for odd research, and showed off a soup bowl that secretly refilled itself¹. The bowl captured his big idea: people eat with their eyes and their surroundings, not just their stomachs.

The scientist, Brian Wansink, ran Cornell’s Food and Brand Lab³. His lab reported that people eat more from big bowls, more while watching action movies, and more when they sit near the buffet¹. Those findings became staples of diet advice. He also helped shape the 2010 federal dietary guidelines¹.

Then it came apart. In September 2018, journals in the JAMA Network retracted six of his papers, and Cornell announced that a faculty committee had found academic misconduct².

So is the whole idea wrong? No. When other researchers tested food placement in a real hospital cafeteria, simple changes to labels and shelves shifted purchases for two years⁹. Surroundings matter. Some of the most quoted examples were simply the weakest evidence.

This guide sorts what holds up from what doesn’t. Then it turns the strongest findings into a room-by-room checklist you can use this week.

A famous food lab’s findings fell apart under scrutiny

The trouble started with a 2016 blog post. In it, Wansink described running analyses on the same data again and again until something turned up¹. That practice, often called p-hacking, can make chance results look like discoveries¹.

The post caught the eye of Tim van der Zee, who teamed up with Jordan Anaya and Nick Brown to comb through Wansink’s work. Just four papers yielded a tally of 150 problems with data collection and statistics¹.

In May 2018, JAMA posted expressions of concern and asked Cornell to check the work. Cornell said it did not have the original data and could not vouch for the results². The retractions followed that September.

Cornell Provost Michael Kotlikoff said the committee found misreported data, problematic statistical techniques, poor documentation and storage of research results, and inappropriate authorship². Wansink was removed from teaching and research and resigned, effective at the end of the academic year². He defended his lab’s work².

By November 2018, Cornell had gone further. In a letter, Kotlikoff wrote that the committee had concluded, “by a preponderance of the evidence,” that Wansink falsified data³.

The retractions kept coming. By December 2018, Retraction Watch counted 17 retracted papers, one of them retracted twice⁴. One retracted study dealt with bowl size⁷.

A retraction doesn’t prove every claim false. It does mean the published data can’t be trusted as evidence. That’s why this article doesn’t cite his studies directly, and why the next question matters: what happened when other scientists tested the same ideas?

Smaller plates: other scientists checked, and the effect mostly vanished

The small-plate tip sounds sensible. A normal serving looks bigger on a small plate, so you might feel satisfied with less. The question is whether people eat less.

A 2014 meta-analysis by Robinson and colleagues found no consistent effect. Its small overall effect hinged on a handful of studies reporting large effects, all from the Cornell lab, and several of that lab’s studies have since been retracted⁶⁷. In a 2015 Cochrane review of portion, package and dishware size, 13 of the 72 included articles came from that lab, and all were rated at high or unclear risk of bias⁶.

A 2016 review found large effects when people served themselves and didn’t know they were in a food study. It found none when the portion was fixed. Like the other two reviews, it included several studies from the Cornell lab⁶.

Then came preregistered trials, where researchers post their plan and analysis before they start. That keeps anyone from moving the goalposts later.

In a 2019 trial by a team of UK researchers, 134 adults served themselves lunch from either a larger or a smaller plate⁵. The plates measured about 29 and 23 centimeters across⁷. People with larger plates ate about 19 calories more, roughly 3%, a gap small enough to be chance⁵. They did leave more food behind⁵.

In a preregistered trial published in 2024 in the journal Appetite, 50 women ate a self-serve breakfast twice, once with smaller dishes and once with larger ones⁷. Average breakfast intake was 394.8 calories with small dishes and 394.4 with large ones⁷. Smaller dishes didn’t significantly change hunger, fullness or how much they ate later that day⁷.

Fair caveats apply. These trials were not huge, and a small effect can’t be ruled out⁵.

A 2019 editorial in the journal that published the UK trial concluded there was no solid evidence to recommend smaller dishware⁶. If you like small plates, they won’t hurt. Just don’t count on them.

What does hold up: distance and the number of choices

The strongest food-environment evidence comes from two simple levers. One is availability, meaning how many options are on offer. The other is proximity, meaning how close they are.

A 2019 Cochrane review led by Gareth Hollands pulled together 24 randomized trials with 3,052 people⁸. A randomized trial assigns people by chance to one setup or another, so the setup itself explains any difference.

Offering fewer options cut how often people chose the targeted food. The effect on how much they ate was less certain⁸.

Putting food farther away reduced how much people ate, across 12 studies with 1,098 people⁸. The authors translated that into plain terms: for a 200-calorie snack, about 38 fewer calories, or roughly 19%⁸.

The caveats matter. The review rated the evidence low certainty. Most studies were done in labs, and most in the United States⁸. Effects were larger in studies at higher risk of bias⁸.

Two of the included studies were led by Wansink. The review left one out of its analysis because it reported modeled data and the raw observations couldn’t be obtained. The other, a 2006 field study of chocolate placement, stayed in⁸. The review doesn’t mention the retractions.

So the honest label is promising but early. The likely reason it works is simple: distance adds a little effort, and out of sight means fewer cues to eat.

A hospital cafeteria tested it for two years

The best real-world test comes from Massachusetts General Hospital in Boston. A team led by Dr. Anne Thorndike studied the main cafeteria, which averaged 6,511 transactions a day⁹.

In March 2010, every item got a traffic-light label: green for the healthiest, yellow for less healthy, red for items with little or no nutritional value¹⁰. Three months later, staff rearranged drinks, sandwiches and chips. Water, diet drinks and low-fat dairy moved to eye level, and less healthy drinks went to lower shelves¹⁰.

Two years later, red items had fallen from 24% to 20% of sales, and green items had risen from 41% to 46%⁹. Red drinks dropped from 26% to 17% of drink sales⁹. Among 2,285 employees who used the cafeteria regularly, red drink purchases fell from 23% to 14%⁹. Overall cafeteria sales held steady¹⁰.

The study had limits. It compared before and after, with no comparison cafeteria, and it tracked purchases, not what people ate or weighed⁹. Still, two years is a long time for a change to last, and nothing about it required willpower from shoppers.

Defaults: the choice that’s made before you choose

A default is what happens if you do nothing. It’s the side dish that comes with the meal unless you ask for something else, or the setting your phone ships with.

A 2019 meta-analysis by Jon Jachimowicz and colleagues pooled 58 studies with 73,675 people¹¹. Defaults shifted choices substantially on average, but results varied widely. Some had no effect, and two backfired¹¹. Defaults worked better when people saw them as a recommendation or as the normal way things are done¹¹.

There’s an important caution.

In 2022, a team of researchers reanalyzed a large review of “nudges,” small changes in how choices are presented. They adjusted for publication bias, the tendency of exciting results to get published while dull ones sit in drawers¹².

After that adjustment, the average nudge effect shrank close to zero. For health choices, the evidence leaned against any effect. For nudges that change how a choice is set up, which is what a default does, the evidence was undecided¹².

The same authors noted that effects varied a lot, so some nudges may work while many don’t¹². That’s an argument for testing changes on yourself rather than trusting headlines.

Beyond the kitchen: stairs, sidewalks and the bedroom

The best-tested environment change for movement is almost too simple: a sign.

The Community Preventive Services Task Force reviewed 11 studies of signs placed near stairs, elevators and escalators¹³. In 10 of them, more people took the stairs. The median gain was 2.4 percentage points, a 50% relative increase¹³. The Task Force rated the evidence strong¹³.

Neighborhoods matter too. In 2016, the Task Force recommended pairing activity-friendly routes, such as sidewalks, bike lanes and transit, with everyday destinations close to home¹⁴. That finding rests on 90 studies¹⁴.

Small fixes, such as bike racks and safer street crossings, come faster and cost less than rebuilding a town¹⁴. You can’t redraw your city, but you can pick routes, and you can speak up when local plans come up for comment.

The bedroom is an environment, too. The CDC advises keeping it quiet, relaxing and cool, and turning off electronic devices at least 30 minutes before bed¹⁵. It also recommends going to bed and getting up at the same times every day¹⁵.

None of this is new to many natural-health traditions, which build health into daily surroundings and rhythms: a garden close at hand, meals at set times, walking as a way of getting around. Designing your surroundings is a modern name for an old practice.

It also takes the blame off willpower. Needing help from your environment isn’t a flaw; it’s how people work.

A room-by-room checklist

Pick two or three changes, keep them for two weeks, then notice what shifted. The last column is honest about how well-tested each idea is. Many home tips borrow from cafeteria and lab research, so they are reasonable guesses rather than proven prescriptions.

Space	Make the helpful choice easy	Add friction to the unhelpful one	How well-tested
Kitchen counter	Keep a fruit bowl and a filled water pitcher in plain view	Clear sweets and chips off the counter	Proximity: promising but early8
Fridge and pantry	Put washed, cut vegetables at eye level, front and center	Store treats on high shelves, in opaque containers or at the back	Placement: promising but early89
Grocery list	Buy the foods you want to eat more often	Buy fewer kinds of snack foods, so fewer options are in the house	Availability: promising but early8
Dining table	Serve vegetables at the table and leave seconds on the stove	Skip eating straight from large packages	Informed guess based on proximity8
Entryway	Leave walking shoes, a water bottle or a gym bag by the door	Put the car keys somewhere slightly less handy on short-trip days	Informed guess
Stairs at work or home	Tape a reminder at the elevator or stair landing	Use the elevator only for heavy loads	Strong evidence in public buildings13; untested at home
Bedroom	Keep it quiet, cool and relaxing, with set sleep and wake times	Charge your phone outside the room; devices off 30 minutes before bed	CDC guidance15
Phone	Put helpful apps (a walking map, a recipe list) on the home screen	Move time-wasting apps into a folder or off the home screen	Informed guess; test it on yourself
Neighborhood	Map a 10-minute walk that starts at your door	Choose the parking spot farther from the entrance	Promising but early; Task Force recommends for communities14

To run your own check, write down the two changes you made and the date. After two weeks, ask three questions:

• Did I eat, move or sleep differently?
• Did the change survive a busy week?
• Do I want to keep it, adjust it or drop it?

What the evidence shows

Claim	Evidence rating	What it rests on
Signs at stairs and elevators increase stair use	Strong evidence	Task Force review of 11 studies; 10 found increases13
Placing food farther away reduces how much people eat	Promising but early	Cochrane review; low certainty; mostly lab studies; one Wansink-led study remains in the analysis8
Offering fewer options reduces selection of a food	Promising but early	Cochrane review, low certainty; effect on eating less clear8
Labels plus shelf placement shift cafeteria purchases	Promising but early	One large two-year hospital study without a comparison site910
Defaults change choices	Promising but early	58-study meta-analysis found sizable average effects; a 2022 bias-adjusted reanalysis was undecided for nudges that change how a choice is set up1112
Activity-friendly routes and nearby destinations raise physical activity	Promising but early	Task Force found enough evidence to recommend, but most of the 90 studies were snapshots in time, and long-term data are limited14
Smaller plates make you eat less	Evidence says no, or unsafe	Two preregistered trials found no clear effect; earlier reviews leaned on studies from one lab, some since retracted567

Questions readers ask

The bottom line

Your surroundings shape what you eat, how much you move and how well you sleep. The best-supported moves are simple: keep the foods you want close and visible, keep fewer tempting options around, put the others out of reach, and make the healthy choice the default. Signs at the stairs and walkable routes help, too.

Skip the famous tricks that rested on retracted or one-lab research, such as smaller plates. Try two or three changes from the checklist, give them two weeks, and keep what works for you.

Keep exploring: how habits form and behavior change science.

Related reading

• Old habits run on cues rather than willpower, and you can rewire them
• Behavior science tested its own tricks at scale, and rewards and repetition held up
• Antidepressant trials succeeded 94% of the time in journals and 51% of the time in FDA files
• Walking clubs work, and you need fewer steps than you were told
• A habit is a shortcut your setting triggers, and this is how one forms

Sources

1. NPR. “Cornell Food Researcher’s Downfall Raises Larger Questions For Science.” NPR, The Salt, September 26, 2018. npr.org
2. Flaherty C. “Cornell Professor Found to Have Engaged in Academic Misconduct Resigns.” Inside Higher Ed, September 20, 2018. insidehighered.com
3. Dahlberg B. “Cornell Finds Laboratory Head Falsified Data.” WSKG, November 6, 2018. wskg.org
4. Retraction Watch. “The Joy of Cooking, vindicated: Journal retracts two more Brian Wansink papers.” December 5, 2018. retractionwatch.com
5. Kosīte D, König LM, De-Loyde K, et al. “Plate Size and Food Consumption: A Pre-Registered Experimental Study in a General Population Sample.” International Journal of Behavioral Nutrition and Physical Activity, 2019;16:75. researchportal.bath.ac.uk
6. Olstad DL, Collins CE. “Smaller Dishware to Reduce Energy Intake: Fact or Fiction?” (editorial). International Journal of Behavioral Nutrition and Physical Activity, 2019;16:73. ijbnpa.biomedcentral.com
7. Langfield T, Clarke K, Sadab AA, Jones A, Robinson E. “Impact of Dishware Size on Energy Intake in Adult Females: A Randomized Control Trial.” Appetite, 2024;197:107296. researchonline.ljmu.ac.uk
8. Hollands GJ, Carter P, Anwer S, et al. “Altering the Availability or Proximity of Food, Alcohol, and Tobacco Products to Change Their Selection and Consumption.” Cochrane Database of Systematic Reviews, 2019, Issue 9, CD012573. discovery-pp.ucl.ac.uk
9. Thorndike AN, Riis J, Sonnenberg LM, Levy DE. “Traffic-Light Labels and Choice Architecture: Promoting Healthy Food Choices.” American Journal of Preventive Medicine, 2014. repository.upenn.edu
10. Harvard Gazette. “Color-Coded Labels, Healthier Food.” Harvard University, January 2014. news.harvard.edu
11. Jachimowicz JM, Duncan S, Weber EU, Johnson EJ. “When and Why Defaults Influence Decisions: A Meta-Analysis of Default Effects.” Behavioural Public Policy, 2019;3(2):159-186. ideas.repec.org
12. Maier M, Bartoš F, Stanley TD, et al. “No Evidence for Nudging After Adjusting for Publication Bias.” Proceedings of the National Academy of Sciences, 2022. pmc.ncbi.nlm.nih.gov
13. Community Preventive Services Task Force. “Physical Activity: Point-of-Decision Prompts to Encourage Use of Stairs.” The Community Guide, review completed June 2005. thecommunityguide.org
14. Community Preventive Services Task Force. “Physical Activity: Built Environment Approaches Combining Transportation System Interventions With Land Use and Environmental Design.” The Community Guide, December 2016, page reviewed December 2025. thecommunityguide.org
15. Centers for Disease Control and Prevention. “About Sleep.” CDC, updated May 15, 2024. cdc.gov