Biases › Risk
Risk
Regret aversion (risk reversal)
We pick the option we're least likely to regret.
People avoid choices they expect to regret; removing the downside removes the regret.
Simonson (1992), The influence of anticipating regret and responsibility on purchase decisions.
What is Regret aversion?
Regret aversion is a behavioural bias (risk family): people avoid choices they expect to regret; removing the downside removes the regret. Anticipated regret makes people delay or avoid decisions. Nudgeswipe rates the evidence as strong. Source: Simonson (1992), The influence of anticipating regret and responsibility on purchase decisions.
The original study
Simonson (1992), The influence of anticipating regret and responsibility on purchase decisions.
- Method
- Purchase scenarios where participants were or weren't asked to imagine how they would feel if their choice turned out badly.
- What it found
- Anticipating regret made people more likely to choose the safer option, e.g. a well-known brand or buying now rather than waiting.
The research
Anticipated regret makes people delay or avoid decisions. A guarantee or long return window takes away the cost of being wrong. 'Risk reversal' is the marketing tactic; regret aversion is the bias underneath.
● Strong evidence
Source: doi.org/10.1086/209290
Key takeaways
- Honest nudge
Put the guarantee where the decision happens, with the conditions in plain words.
Example: IKEA takes the regret out of buying furniture → - Dark-pattern line
Guarantees with conditions buried in small print.
Use it
Apply this with your agent
The prompt carries this bias, its evidence rating and the honest-vs-dark line.
ChatGPT, Claude, Grok and Cursor open with the prompt filled in (it is also copied, in case the prefill doesn't load). Gemini and Codex don't support prefilled links, so the prompt is copied and the app opens; paste it in.
Frequently asked questions
What is Regret aversion?
Regret aversion is a behavioural bias: people avoid choices they expect to regret; removing the downside removes the regret.
How does Regret aversion work?
Anticipated regret makes people delay or avoid decisions. A guarantee or long return window takes away the cost of being wrong. 'Risk reversal' is the marketing tactic; regret aversion is the bias underneath.
How strong is the evidence for Regret aversion?
Nudgeswipe rates it strong evidence. Original source: Simonson (1992), The influence of anticipating regret and responsibility on purchase decisions.
How can you use Regret aversion honestly?
Put the guarantee where the decision happens, with the conditions in plain words.
When does Regret aversion become a dark pattern?
Guarantees with conditions buried in small print.
Which brands use Regret aversion?
Nudgeswipe has 12 teardowns of brands using it, including IKEA, Spotify, Duolingo, Booking.com, YouTube. Whether it lifted their results is not public unless a teardown cites it.
In the wild
12 real examples
IKEA takes the regret out of buying furniture
IKEA · Checkout / policy
Spotify's cancel article says you keep your playlists
Spotify · Help / support (policy)
Duolingo Super shows a three-step trial timeline
Duolingo · App onboarding / trial
Booking.com answers "what if I change my mind?" before you search
Booking.com · Homepage
YouTube Premium promises a reminder 7 days before the free month ends
YouTube · Paywall / trial · $ as captured
Strava turns its free trial into a three-step timeline
Strava · Paywall / trial · $ as captured
GitHub opens its pricing page with a "risk-free" 30-day trial
GitHub · Pricing page
Grammarly says "$0 payment today" and promises a reminder 2 days before the trial ends
Grammarly · Pricing page · $ as captured
Currys promises "Found it cheaper? We'll match it" and shows the 29.9% APR
Currys · Homepage · £ as captured
Oddbox leads with "68,000+ TONNES RESCUED" and promises you can "switch, swap or stop at any time"
Oddbox · Homepage
Anything we can help you with?
Evelyn & Bobbie sends the abandoned cart from a named fit expert
Evelyn & Bobbie · Email
Your free trial to Calm
Calm's trial email states the renewal date, price and how to cancel
Calm · Email · $ as captured
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