Set the smallest win that would make a coin-flip gamble worth accepting, then explore what your answer can tell you. Five short chapters and eight checks explain reference points, everyday examples, and the limits of loss aversion research in about twelve minutes.
Loss aversion is the tendency for a loss to carry more weight than an equal-sized gain, measured against a reference point such as what you own or expect. Losing $10 may matter more to a decision than gaining $10. The pattern depends on the task and situation: it is not a rule that everyone feels losses twice as strongly.
Loss Aversion Examples
A person feels more disappointed by losing a $10 credit than pleased by receiving an extra $10 credit.
A free trial starts to feel normal, making the loss of a feature stand out more than the savings from canceling.
A change of workspace feels unattractive when attention stays on the familiar things being given up rather than the improvements.
These are possible examples, not proof of the cause. Costs, preferences, and practical needs can explain the same decisions.
The study behind the idea
In Kahneman and Tversky’s 1979 paper, participants made choices between hypothetical risky prospects, with patterns that challenged expected utility theory as a description of behavior. The authors proposed prospect theory, which evaluates gains and losses relative to a reference point and gives losses a steeper value function than gains.
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20 points for completing the experiment, then 10 per check. Retries earn full points. First-attempt accuracy is counted separately.
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Chapter 1 / 5
Set your threshold
What would make the bet worth it?
A small possible loss can change how attractive a win feels. Try a single decision before reading the model behind it.
Answer for yourself today. You can prefer any amount, or prefer not to take the bet.
Your coin-flip decision
Imagine one fair coin flip with a trusted person. Heads: you receive a win of your choosing. Tails: you lose $10 of your own money. Decline: nothing changes. No money changes hands here, and you do not need to flip a coin.
Heads · 50%You gain your chosen amount.
Tails · 50%You lose $10.
Check 1 of 8 · 10 insight points
If your minimum win is $18 against a possible $10 loss, what is your win-to-loss ratio?
Complete this chapter’s activity and checks to continue.
Chapter 2 / 5
Read the evidence
Loss aversion theory: start with a reference point
A reference point is the baseline you compare an outcome with. The same outcome can feel like a gain or a loss when that baseline changes.
A $45 workshop fee might feel like a loss against an expected $40 fee, or a saving against an expected $50 fee. The price is unchanged; the comparison differs.
What the research can tell us
Prospect theory describes choices, rather than setting a rule for what people ought to choose. Its later cumulative version also models how people weight probabilities.
Tversky and Kahneman (1992) estimated a median loss-aversion parameter of 2.25 from their choice data. That is one model estimate from one procedure, not a conversion rate between pleasure and pain. Your simple win-to-loss ratio is not the same fitted parameter.
Why “twice as much” needs care
Gal and Rucker (2018) challenged the claim that losses generally have greater impact than gains. Their review is an argument about how broad the principle should be, not a reason to dismiss every observed gain-loss asymmetry.
Mrkva and colleagues (2020) found loss aversion across several samples, with lower loss aversion associated with greater relevant knowledge and experience. Taken together, the evidence supports studying the conditions and competing explanations. The pattern can be weaker than the familiar slogan suggests, and it is not universal.
Ask three questions of any headline: What counted as a loss? What did participants actually choose? What else could explain their responses?
Check 2 of 8 · 10 insight points
A workshop fee rises from an expected $40 to $45. What is the reference point in this description?
Check 3 of 8 · 10 insight points
A study reports a loss-aversion parameter near two. What follows?
Complete this chapter’s activity and checks to continue.
Chapter 3 / 5
Spot the difference
Loss aversion bias or something else?
Mina is offered a free replacement for her reading lamp. She keeps imagining the familiar lamp leaving her desk. That could be a useful clue, but it does not tell us the whole story.
Perhaps the replacement gives her headaches. Perhaps the old lamp belonged to a friend. Learn the reason before naming a bias.
Loss aversion
An equal loss weighs more than a gain, relative to a reference point.
Risk aversion
A preference for a sure outcome over a risky alternative with the same expected value. It can appear even when every outcome is a gain.
Endowment effect
Owning an object changes its valuation. Loss aversion is one proposed explanation, but ownership and personal meaning can matter too.
Leila dislikes losing a $10 studio credit more than she values receiving an extra $10 credit. Which clue best fits loss aversion?
Check 5 of 8 · 10 insight points
Omar declines a coin-flip gamble because losing $10 would leave him short for the bus. What can you conclude?
Complete this chapter’s activity and checks to continue.
Chapter 4 / 5
Try a decision pause
Give both sides of the choice a hearing
Mina does not need to talk herself into giving up the lamp. She needs a clear view of what matters about each option.
Try this pause with a small everyday choice. The goal is to make your reasons visible, not to remove every preference for what you already have.
Name the baseline. What do I own or expect right now? Am I treating that starting point as the only acceptable outcome?
Write both sides. What would I gain and lose by changing? What would I gain and lose by staying?
Check the practical stakes. What can I afford to give up? What information, trial, or reversible step would help?
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Use the idea fairly
If you design a trial or an offer, show people the cost, the changes, and the exit clearly. A person’s reluctance to leave does not prove satisfaction. Give them enough information to decide without pressure.
Check 6 of 8 · 10 insight points
Mina could replace her reading lamp for free. She focuses only on losing the familiar one. Which prompt broadens the comparison?
Complete this chapter’s activity and checks to continue.
Chapter 5 / 5
Take the idea with you
A ratio is a clue, not a label
Return to your coin-flip choice. Was your answer about the money, the uncertainty, the imagined loss, or simply not wanting to play? Several reasons can lead to the same threshold.
You have practiced noticing a pattern and asking what the evidence supports. Now test that distinction in two final situations.
Myopic loss aversion
Benartzi and Thaler (1995) combined sensitivity to losses with frequent evaluation of investment outcomes. Their model calls this myopic loss aversion: short evaluation windows can make losses more prominent even when someone has a longer horizon. It is a proposed explanation of behavior, not a rule about when you should check an account.
Check 7 of 8 · 10 insight points
A learner accepts a $10 win against a $10 loss. Their ratio is 1. What does that show?
Check 8 of 8 · 10 insight points
Which statement best captures myopic loss aversion?
One thought to keep
Five chapters complete
Keep the question, not the label.
Your coin-flip threshold describes a choice in one imagined situation. In everyday decisions, ask what feels like a loss, what you might gain, and what practical reasons matter.
Clear your experiment, answers, stamps, and reflections on this device?
Loss aversion: common questions
What does loss aversion mean?
Loss aversion means an equal-sized loss can weigh more than a gain relative to a reference point, such as current ownership or an expectation. Its strength depends on the situation and the way choices are measured.
What is an example of loss aversion?
Feeling the loss of a $10 credit more strongly than the gain of an extra $10 credit is a possible example. A single decision is not proof: practical constraints or different preferences may explain it.
Is loss aversion the same as risk aversion?
No. Risk aversion concerns a preference for certainty over a risky alternative with the same expected value. Loss aversion compares the weight of losses and gains. A person can show either pattern without the other.
What is myopic loss aversion?
Myopic loss aversion combines sensitivity to losses with frequent, narrow evaluation of outcomes. Benartzi and Thaler used this idea in a model of investment behavior. It is not a personal assessment or a universal explanation.
How can I respond to loss aversion?
Name your reference point, compare the gains and losses of both changing and staying, and check the practical stakes. This is a reflection prompt, not a guaranteed way to remove bias. The Endowment Effect course offers another experiment with ownership and value.
Psychology.com. (2026, September 16). Loss Aversion. Psychology.com. https://psychology.com/courses/loss-aversion
More mini courses
The Endowment Effect (12 to 15 minutes): Run the classic mug experiment on yourself, then learn why ownership inflates value and how to spot it in daily life.
The Sunk Cost Fallacy (12 to 15 minutes): Run a small cinema through three decisions. Separate past spending from future tradeoffs, and learn why quitting is not always the answer.
Anchoring Bias (12 to 15 minutes): Spin a random wheel, compare your estimate with its anchor, and practice using evidence to make better judgments.
Important: This is a free educational mini course. It is not therapy, treatment, a psychological assessment or a credential, and no continuing-education credit is awarded. If you are struggling, reach out to a licensed mental-health professional. In an emergency, call your local emergency number or, in the US, call or text 988.
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