IKEA Effect
- “why do I love the thing I built”
- “ikea effect explained”
- “why is my own work always better to me”
- “kill your darlings psychology”
01 · Side by side
Side by side
Comparison sheet
| Aspect | IKEA effect | Sunk cost fallacy |
|---|---|---|
| Requires | Completion | Unrecoverable spend |
| Object | A finished thing | An ongoing commitment |
| Produces | Overvaluation | Continued investment |
| If abandoned | Disappears | Intensifies |
02 · Which one you meant
Which one did you mean?
In shortReaders who land here meaning IKEA Effect rather than Sunk cost fallacy are usually searching for phrases like “why do I love the thing I built”, “ikea effect explained”, “why is my own work always better to me”.
Sunk Cost Fallacy
- “why can't I quit something I've invested in”
- “I've come too far to stop now”
- “sunk cost fallacy relationship”
- “staying because of what I've already spent”
03 · Which came first
Which came first
In shortSunk cost fallacy. 1985 — Hal Arkes and Catherine Blumer publish 'The Psychology of Sunk Cost'. Buyers of a university theatre season ticket were randomly given the full $15 price, $13, or $8. Over the first half of the season, full-price buyers attended significantly more plays — identical tickets, identical shows, different amounts already spent.
- 1985
Sunk Cost Fallacy. Hal Arkes and Catherine Blumer publish 'The Psychology of Sunk Cost'. Buyers of a university theatre season ticket were randomly given the full $15 price, $13, or $8. Over the first half of the season, full-price buyers attended significantly more plays — identical tickets, identical shows, different amounts already spent.
- 2011–12
IKEA Effect. Norton, Mochon and Ariely publish 'The IKEA Effect: When Labor Leads to Love'. Participants who assembled storage boxes, folded origami and built Lego valued their own amateur output roughly on a par with expert-made equivalents — and expected others to agree.
04 · The mix-up
Where the confusion comes from
The mix-up“It's just the sunk cost fallacy wearing a different hat.”
What's true
Different mechanisms, different triggers. Sunk cost is about refusing to abandon something because of what you've spent, and grows with unrecoverable investment. The IKEA effect depends on completion — when participants destroyed or failed to finish their creations, the effect dissipated. Sunk cost bites hardest when you're losing; the IKEA effect requires you to have succeeded.
05 · Read either one