Weigh To Go September 1, 2010
Mindless Eating Why We Eat More Than We Think Brian Wansink, PhD
Overeating Why do we overeat? Not because of hunger, but because of family/friends, packages, names, numbers, labels, lights, colors, candles, shapes, smells, distractions, and containers Research examining people who think eating is determined by how hungry they are, how much they like the food, and their mood Why do we overeat foods that don t taste good? Signals/cues around us that tell us to eat For example, if we finish everything on our plate, that s a cue that it s time to stop
Stale Popcorn There s no right amount of popcorn to eat during a movie Cues around us size of the popcorn bucket can provide a powerful suggestion on how much to eat Participants given a free bucket of popcorn, either medium or large, & a soda Asked to answer a few concession stand questions after the movie
Stale Popcorn, Cont d Unknown to participants, the popcorn was 5 days old During the movie, people would take a few bites and then put the bucket down, pick it up again and have a few more bites, and so on Buckets were weighed at the end of the movie The large bucket group ate an average of 173 more calories (53% more) People eat more if you give them a bigger container
Reengineering Strategy # 1 Think 20% more or less Americans usually stop eating when they re full, those in leaner cultures stop eating when they re no longer hungry There is a significant calorie gap between the two Dish out 20% less than you think you might want before you start to eat, you probably won t miss it For fruits and vegetables think 20% more
Bottomless Soup Bowl Participants were given a free lunch of soup What they didn t know was, for some, the bowl of soup would constantly be refilled Tubing was run from the bottom of the table into the bowls After 20 min. participants were asked how many calories and how many ounces they thought they had eaten Soup was then weighed
Bottomless Soup, Cont d Normal soup bowl participants Ate about 9 ounces of soup Thought they ate 123 calories worth of soup, but had eaten 155 calories Bottomless soup bowl participants Most were still eating when they were stopped after 20 min. Ate about 15 ounces of soup, some ate more than a quart Thought they ate 127 calories worth of soup, but had eaten 268 calories
Reengineering Strategy # 2 See all you eat When people pre-plate their food, the eat ~14% less than those who go back for seconds If you re eating chicken wings or ribs, you ll eat less if you see what you ve already eaten, the same is true for beverages
Drinking Glass Illusion It s estimated that 72% of what we eat comes from foods we eat from bowls, plates, and glasses These containers can cause us to misjudge how much foods/beverages we re consuming Horizontal/Vertical Illusion
Beverage Illusion Campers were randomly given either a tall, skinny glass or a short, wide glass with the same capacity They were asked to estimate how much beverage they poured Campers with tall, thin glasses poured about 5.5 ounces Campers with the short, wide glasses poured about 9.6 ounces, 75% more, Also they estimated that they poured only 7 ounces
Size-Contrast Illusion 4 ounces of mashed potatoes on a 12-inch plate will look like a lot less than if it was on an 8-inch plate The larger plate will likely influence you to serve more Since we tend to clean our plates, we will probably end up eating it all
Ice Cream Social Participants were given either a medium size (17 ounce) bowl or a large size (34 ounce) bowl Size of the ice creams scoops varied (2 or 3 ounces) Told they could take as much ice cream as they wanted The bowls were then weighed
Ice Cream Social, Cont d Those with the large bowls, dished out 31% more ice cream, about 127 more calories Those with the large bowls and 3 ounce scoop dished out 57% more ice cream than those with the small bowl and small scoop As the size of our dish increases, so does the amount we scoop onto them
Reengineering Strategy # 3 Be your own tablescaper Mini-size boxes, bowls, and plates to decrease what you eat by 20-30% less Repackage large boxes into smaller bags or containers Use slender glasses to pour less beverages
The See-Food Trap Simply seeing or smelling a food can lead us to want to devour it Secretaries were given dishes of 30 Hershey s Kisses and told not to share them Dishes were identical except half were clear and half were white so that they totally hid the chocolates
Hershey s Kisses Secretaries who had the candy in clear dishes were caught in the candy dish 71% more often (7.7 vs. 4.6 times) Every day the clear dish was on their desk they ate 77 more calories Over 1 year, that candy dish would have added over 5 pounds
Inconvenience Foods Clear candy dishes that were rotated among 3 locations First week corner of the desk Second week top left-hand desk drawer Third week file cabinet 6 feet from the desk
Inconvenience Foods, Cont d Candy dish on the desk Secretaries consumed ~9 chocolates/day 225 extra calories Candy dish in the desk drawer Secretaries consumed ~6 chocolates/day Candy dish on file cabinet Secretaries consumed ~4 chocolates/day Many indicated that the walk gave them enough time to second guess if they really wanted it
Reengineering Strategy # 4 Make overeating a hassle, not a habit Leave serving dishes in the kitchen or on a sideboard De-convenience tempting foods move these foods to an inconvenient location Snack only at the table and on a clean plate
Comfort Foods Myth #1 Most comfort foods are indulgently unhealthy Myth #2 People tend to eat comfort foods when they re sad, stressed, or bored Myth #3 Comfort food preferences become fixed when we are children
Comfort Foods, Cont d Men and women surveyed to rate the foods they found comforting Women Ice cream, chocolate, and cookies Hassle free foods Men Ice cream, soup, and pizza or pasta Foods that made them feel spoiled, pampered or taken care of
Comfort Foods, Cont d Individuals were also asked when they were most likely to seek out comfort foods 86% when they were happy 74% when they wanted to celebrate or reward themselves 52% when they were bored 39% when they were depressed 39% when they were lonely
Hunger Physical Hunger Builds gradually Strikes below the neck (e.g., growling stomach) Occurs several hours after a meal Goes away when full Eating leads to feeling of satisfaction Emotional Hunger Develops suddenly Above the neck (e.g., a taste for ice cream) Unrelated to time Persists despite fullness Eating leads to guilty and shame
Reengineering Strategy # 5 Make comfort foods more comforting The best way to begin changing behavior is to do so in a way that doesn t make you feel deprived Keep the comfort foods, but eat them in smaller portions or look for healthier versions If your comfort foods consist of the 4 c s cookies, candies, chips and cake all is not lost We can rewire our comfort foods pair healthier foods with positive events Instead of celebrating with a chocolate ice cream sundae, try a smaller bowl of ice cream with fresh strawberries
McSubway Study Individuals who ate at Subway were asked: 1. Estimate how many calories they ate 2. What specific nutrition information they remembered reading 3. Whether the information would influence them in the future 4. List exactly what they ate Calorie consumption was compared to estimated calorie consumption Exact same study done at McDonald s
McDonald s McSubway Study, Cont d Only 57% were even remotely able to recount any nutritional information 18% recalled that McDonald s was offering some lower-calorie option Only 5 of 250 ordered the lower-calorie option Most indicated that more nutrition information would probably not change what they ate Average calorie consumption was 1,093, but they only estimated 876 calories, 25% more
Subway McSubway Study, Cont d 157 of 250 recalled some form of nutrition information 63% correctly recalled that a number of sandwiches had under 6 grams of fat 77% ate their sandwiches with cheese and 79% with some sort of sauce; 53% ordered and finished a bag of chips; 27% ordered cookies Average calorie consumption was 677, but they only estimated 495, 34% more
Reengineering Strategy # 6 Portion-Size Me Beware of the health halo the better the food, the worse the extras People buying low-fat granola ate 21% more calories Supersizing may seem like a bargain, but it will most likely lead to overeating