You Already Chose, So Why Are You Still Rerunning It? How to Stop Second-Guessing Your Decisions

Are you rethinking the decision, or only replaying it?

Check what has arrived since you chose. A fact, a number or an answer you did not have before means you are rethinking, and that is fair work. A new feeling about an old fact is a replay. So is the same pro in different words, or a fourth opinion that matches the first three.

The two feel identical from the inside, but they do not end the same way. In a 2020 experiment, Sandra Llera and Michelle Newman asked 185 people to think about a real problem in their lives. Each was randomly assigned to worry about it, think about it objectively, or do a breathing exercise.

Worrying produced less effective solutions than objective thinking for everyone in the study, not only for habitual worriers (Llera and Newman, Behaviour Research and Therapy, 2020).

A 2003 study by Ward, Lyubomirsky and colleagues found that people with a ruminating style trusted their own plans less and were less likely to commit to them. It shows a link, not a cause. Still, the pattern fits: looping does not improve the plan. It makes you trust it less.

The five-minute check: has anything new come in?

The book calls this the New-Information Test and gives it a PROMISING badge. The studies above support the idea behind it, but the test has never been studied as a named method. Take a pen and do it once.

1. Write the decision as one plain sentence and the date you made it.
2. List every fact you have learned since that date. Feelings and reworded reasons don’t count.
3. If the list is empty, write one word next to it: replaying.
4. If a real fact could still change things, name one action that would bring it in within 48 hours. If you can’t think of one, write “I have enough” and move to the closing tools below.

Which tool fits which moment after you decide?

Six tools cover the stretch from the first doubt to the day the result comes in. SOLID means it held up in tests on people, PROMISING means thin evidence, and STORY ONLY means untested.

Why does a decision you can still undo feel worse?

An open door keeps your attention on the flaws of the room you are standing in. Keeping the option to change your mind feels like the safe move. In the best-known test of that belief, it made people less happy with what they had.

In a 2002 study, Gilbert and Ebert had 64 Harvard undergraduates in a photography course keep one of their prints. Some could swap within five days; the rest had a final choice. Those who could swap liked their print less, and a group asked to predict the result did not see it coming.

Asked which version of a similar study they would rather join, 66.3 percent of a new group of students picked the one where they could change their minds (Gilbert and Ebert, Journal of Personality and Social Psychology, 2002).

A 2013 paper by Bullens and colleagues looked at why. A final choice makes the good parts of your pick and the bad parts of the rejected option easier to recall. A reversible one does the opposite. Their title sums it up: “The grass isn’t merely greener on the other side; it’s also very brown over here.”

Two honest limits. The photo study was small, about a dozen students per group, and no direct preregistered repeat has turned up. And closing only helps a decision you made with care. Closing early on a choice you skipped the work on just makes it final.

How do you close a decision once it is made?

Make it final on paper and in your phone. Write the choice down with the reasons you had, name the one event that would reopen it, and remove whatever keeps showing you the alternatives. The first tool works for any decision, the second for purchases.

The Done Ritual

STORY ONLY

10 minutes, a sheet of paper and an envelope

Use it when: You chose with care and acted (signed, paid, said yes or no), yet your mind still files it under “open.”

1. Write the decision in the past tense, such as “I chose the apartment on Elm Street.”
2. Add the two or three reasons you had at the time. Not the ones you wish you had.
3. Write one real event that would reopen it, like “the landlord fails to fix the heat by December.” A feeling does not count.
4. Sign, date, fold, and write “Done” on the envelope. Then delete the saved search or return the brochures.

Why this badge: The case for closing comes from the Gilbert and Ebert study above. Nobody has tested a closing ritual itself.

Stop Shopping After You Buy

PROMISING

10 minutes and your phone

Use it when: You bought, booked or signed, it works as it should, and you still browse the ones you passed on.

1. List every place you compare: apps, saved searches, price alerts, review sites, newsletters.
2. Remove them now. Delete, turn off, unsubscribe.
3. Write the date the return window closes. Before it, reopen only for the reason you wrote down. After it, not at all.
4. Write one thing you like about what you chose, and add one more each day for a week.

Why this badge: It builds on the open-door study above and on research showing people rate a choice higher once it is made. No study has tested “stop browsing after you buy” directly.

What stops the replay at 2 a.m. and in the shower?

Telling yourself to stop rarely works. The better-tested move is to give the replay an appointment: a short daily slot for worry, with stray worries saved for it.

Drifting back to it is normal. A 2010 iPhone study of 2,250 adults by Killingsworth and Gilbert caught minds wandering in 46.9 percent of random check-ins.

Autopilot Interrupts, for catching the replay

Set three alarms at odd times, like 10:40, 2:15 and 5:50, labeled “Where am I?” When one rings, check whether you were replaying. If so, jot two words for your window and turn back to what is in front of you. The badge is STORY ONLY: reminders help people keep goals, but nobody has tested prompts like these for a replay.

In the book’s example, a pharmacy tech who turned down a day-shift transfer sets her window at 6:30 p.m. Most evenings she reads her notes, finds nothing new, and stops at the timer. The replay does not vanish. It gets smaller and keeps office hours.

How much does a worry window really help?

It helps, but modestly. It is the only tool in the book with a SOLID badge, and the book puts a plain label next to it: small but real. Expect fewer minutes lost to the replay, not a quiet mind.

Across seven randomized trials with 999 participants, postponing worry beat simply writing worries down by about d = 0.31 for duration and d = 0.19 for frequency (Dippel, Brosschot and Verkuil, International Journal of Cognitive Therapy, 2023).

The trials ran from one week to a month, with no long-term follow-up yet. A six-day online version by Versluis and colleagues in 2016 found no effect; only 361 of 996 sign-ups finished, and participants said postponing was hard.

The if-then line in step 2 comes from a 2025 trial by McCarrick and colleagues: adding an if-then plan cut worry time by about 15 minutes over postponement alone, though sleep did not improve.

What if the decision turned out badly?

Then grade how you chose, not how it landed. A bad result after a sound process is bad luck, and it still stings. It is not proof that you cannot be trusted. Your brain blurs the two in two ways, and both are well studied.

Hindsight bias makes a known outcome look obvious; Fischhoff showed it in 1975. Outcome bias grades the choice by the result. In 1988, Baron and Hershey showed people the same decision with only the outcome changed, and across five studies a good result made the identical choice look better.

A preregistered replication with 692 people found outcome bias again, larger than in the original, even among people who said outcomes should not count (Aiyer and colleagues, International Review of Social Psychology, 2023).

The book’s example is an electrician who checked hours and crew before joining a small firm. Eight months later it lost a big contract nobody outside management knew was at risk, and cut her hours.

The Two-Column Review

Draw a line down a page. On the left, under Decision quality, write what you knew, what you did to learn more and how you chose. On the right, under Luck, write everything that shaped the result that you could not have known or controlled. Give the left side a verdict of yes, partly or no.

Then write one line about process for next time. The electrician’s was “ask a small employer how many contracts it depends on.” “Never leave a big company” would be the result talking. The badge is PROMISING: outcome bias is well established, but nobody has tested this review as a remedy.

It works best with a note made before the result: what you knew, what you expect, and how sure you are as a percentage. Write that number before the outcome, never after.

Which popular fixes for doubt don’t hold up?

Two common claims about settling a decision have weak or missing support.

• “Wash your hands and the doubt washes away.” A 2010 study with 40 students found that hand-washing erased post-choice dissonance. A larger preregistered repeat with 286 people found no such effect, and the small difference ran the other way.
• “Rituals are proven to calm nerves.” The best-known paper behind that claim was retracted in 2024. That is why the Done Ritual above is offered as a practice, with its support coming from the research on final choices.

When is second-guessing more than a habit?

When worry is hard to control most days, for months, and wears down your sleep, focus or work. These tools are for decisions, not a treatment for anxiety. The National Institute of Mental Health says: “To be diagnosed with GAD, a person must find it difficult to control worry on most days for at least 6 months.” If that sounds like you, talk to a doctor or a licensed therapist.