Tuesday, 1:40 p.m. You just finished lunch and you're at the grocery store. You walk down the candy aisle and grab the big box of chocolates, the one on sale. "It's for when people come over," you tell yourself. "And if I get a craving, one piece a day. I know myself."
Thursday, 10:47 p.m. It's been a long day, the 4 o'clock meeting went sideways, and the box is sitting in the cabinet, two steps from the couch. You open it "just to grab one." Next thing you know, all that's left is a pile of gold foil and a question: who bought this thinking it would work out?
You did. Just on a full stomach, at 1:40 p.m. on a Tuesday. And that's exactly where the trouble started.
There's a name for this: restraint bias
In 2009, Loran Nordgren, of Northwestern University's Kellogg School of Management, together with Frank van Harreveld and Joop van der Pligt, of the University of Amsterdam, published a paper in the journal Psychological Science with four studies on what people believe about their own ability to control impulses like hunger, drug cravings and sexual arousal.
The finding got a name: restraint bias. It's the tendency to overestimate how well you can hold back an impulse. And the effect doesn't stay in your head. The people with the most inflated belief in their own self-control exposed themselves to more temptation and, as a result, acted more impulsively.
The fourth study is the most striking. The researchers followed people who were trying to quit smoking. The more inflated their confidence in their own self-control, the more they put themselves in situations where they'd want a cigarette. And that translated into more relapses four months later.
In a press release at the time, Nordgren summed it up: people aren't good at predicting how strong their own urges will be, and the people most confident in their self-control are the ones most likely to give in.
The part almost nobody mentions: your well-fed self doesn't know your hungry self
Restraint bias grows out of an older idea. In 1996, researcher George Loewenstein described a kind of empathy gap within the same person: when you're "cold," calm and satisfied, you can't accurately simulate how you'll behave when you're "hot," hungry, tired or in the grip of a craving. It's like trying to remember January's bitter cold on a muggy August afternoon. You know it was cold. You just can't feel it.
Two years later, Daniel Read and Barbara van Leeuwen took the idea to snack time. They approached 200 office workers at companies in Amsterdam and asked them to choose, between fruit (an apple or a banana) and an unhealthy snack (a chocolate bar, chips or nuts), what they wanted to receive a week later. Some made the choice right after lunch. Others made it in the late afternoon, when they were already hungry.
The ones who chose while hungry asked for more unhealthy snacks for the following week, even though the decision was for another day. The state of the moment leaked into the future.
Then came the part that stings. A week later, when the snacks were handed out, the researchers offered a chance to switch. Among the people who had picked fruit, between 62% and 82%, depending on the group, switched to the unhealthy snack. Going the other way, almost nobody switched: 0% to 8%. The promise made with a cool head almost always lost to the moment.
The two versions of you
| You, in a cold state | You, in a hot state |
| Just had lunch, slept well, feeling calm | Hungry, tired, angry, bored, 10:47 p.m. |
| "One piece a day, I know myself" | "Just tonight, it's been a rough day" |
| Thinks the urge will be weak and easy to manage | Finds out how strong the urge really is |
| Buys the big box and leaves the phone on the nightstand | Finds the box and the phone exactly where they were left |
| Makes the plan | Has to follow through on it |
How big this really is, without the hype
The two papers tell the same story, but there are four things they don't say.
First: the study of people quitting smoking shows an association. Inflated confidence went hand in hand with more exposure and more relapse, but the design doesn't let us say that it, on its own, caused each relapse. The paper's other three studies, according to the authors, also found the bias.
Second: the snack study measured a small choice, fruit versus chocolate, in 200 office workers in Amsterdam whom the authors themselves estimated to be between 20 and 40 years old. It's a good model of the mechanism, not a measure of how much it weighs in bigger decisions.
Third: neither study says willpower doesn't exist. They say we misjudge how much of it we're going to need.
The fourth is the most useful. Nordgren's advice, in the same press release, wasn't to try harder. It was the opposite: avoid the situations where weaknesses thrive, and keep a humble view of your own willpower.
From the cold plan to the hot moment: the EITA approach
The EITA method trains the shift from an automatic reaction to a conscious process. Applied to restraint bias, the path has four steps.
Step 1: Be suspicious of promises made on a full stomach
Every time you hear yourself say "I've got this," ask what state you're in when you make that prediction. If it's after lunch, well rested and in a good mood, the prediction isn't worth much at 10:47 p.m. on a Thursday. You don't have to give up the plan. You just have to stop counting on it alone.
Step 2: Use distance, not force
The decision that protects you most gets made ahead of time: at the store, when you set up your bedroom, when you configure your phone. The small box instead of the big one. The candy on the top shelf of the laundry room cabinet. The phone charger in the living room. Every extra step between you and the impulse is a step your hot-state self will be too lazy to take.
Step 3: Leave a note for your hot-state self
Your cool-headed self knows things you'll forget in the heat of the moment. Write them down while you still remember: "You're going to want to open this when you're tired. Tired isn't hungry. Take a shower first." It can be a sticky note on the cabinet door, or a phone reminder set for the time it usually happens. It's the cold plan showing up in the hot moment, in your own voice.
Step 4: When the heat hits, buy yourself ten minutes
Even with all of this, there will be nights when the impulse shows up strong. In that moment, the goal isn't to beat the craving; it's to buy time. Name the state ("I'm tired and irritated, not hungry"), wait ten minutes and decide after that. In practice, a lot of cravings lose steam when they aren't satisfied right away.
EITA Mentor walks you through this process on WhatsApp, 24 hours a day, including Thursday at 10:47 p.m., with your hand already on the cabinet door or that heated reply already typed into the group chat. She's the cool-headed voice available in the hot moment: she helps you name the state, sits through the ten minutes with you and, the next day, helps you plan the distance for next time.
Talking it out helps in the moment. When the pattern keeps repeating, understanding where it comes from is what brings change: at EITA Academy, EITA's training area, the course "Os nove sabotadores" ("The Nine Saboteurs"), by neuroscientist Marina Marzotto, shows the patterns that make you promise one thing and do another, with exercises to work through alongside EITA. The courses are in Portuguese.
Two everyday examples
The cases below are illustrative, created to explain the concept. They are not real people or accounts from clinical sessions.
Rachel, 47, financial analyst. She swore she'd stop scrolling in bed "on willpower alone," and slept with her phone charging on the nightstand. In Step 2, she moved the charger to the kitchen and bought a ten-dollar alarm clock. The first week, she got up to get her phone twice. By the third week, not once.
Paul, 52, teacher. He kept promising he'd stop arguing about politics in the family group chat, and he kept jumping in at 11 p.m. In Step 3, he pinned a note to himself in his phone: "If it's after 10 p.m., reply tomorrow." He started muting the group at night and answering in the morning, when the topic had almost always cooled off.
This is a skill, not a gift
People who seem to have tons of self-control rarely spend their lives resisting. They've learned not to put themselves in front of what they don't want to do. At first, getting the chocolate out of the house or the phone out of the bedroom feels like weakness, as if you were admitting you can't handle it. With repetition, it just becomes organization: the same as keeping the knife away from the edge of the counter.
And there's a hidden payoff: when you stop spending energy resisting what's an arm's length away, you have energy left over for what matters. Thursday night gets lighter, not because you got stronger, but because there's less to fight.
Frequently asked questions
Is restraint bias the same as compulsion or addiction?
No. Restraint bias is a prediction error that shows up in people on average, including people who are doing just fine: they think they'll resist more than they actually do. Binge eating, substance addiction and gambling addiction are clinical conditions, with repeated loss of control, distress and real harm to your life. If you feel you've lost control over food, alcohol, betting or another substance, get an evaluation from a psychologist or psychiatrist.
So I shouldn't trust my willpower?
You can, just not on its own. Willpower works better as a last resort than as the main plan. People who pair a good cool-headed decision with some distance from temptation need it a lot less.
Does this replace therapy?
No. EITA is self-awareness training and day-to-day support, and it doesn't replace psychological or psychiatric care. If impulses are taking a toll on your health, your work or your relationships, see a professional. If you are in crisis or thinking about suicide, contact your local emergency number right away. In the US, call or text 988 (Suicide & Crisis Lifeline); in the UK and Ireland, call Samaritans on 116 123; in Brazil, call CVV on 188.
Sources
- Nordgren, L. F., van Harreveld, F., & van der Pligt, J. (2009). The restraint bias: How the illusion of self-restraint promotes impulsive behavior. Psychological Science, 20(12), 1523-1528. PubMed record
- Association for Psychological Science (2009). Temptation more powerful than individuals realize. Press release on the study by Nordgren and colleagues. ScienceDaily
- Loewenstein, G. (1996). Out of control: Visceral influences on behavior. Organizational Behavior and Human Decision Processes, 65(3), 272-292. Article DOI
- Read, D., & van Leeuwen, B. (1998). Predicting hunger: The effects of appetite and delay on choice. Organizational Behavior and Human Decision Processes, 76(2), 189-205. PubMed record · Article PDF (University of Warwick)
Anaclaudia Zani is a psychologist (CRP 06/128106, Brazil) and neuroscientist, creator of the EITA method and of EITA Mentor.