What the jam study found — and why the choice-overload effect has not replicated.
What the evidence says
- Excessive choice leads to decision paralysis and decreased satisfaction[1]
- Choice overload reduces likelihood of making any decision[1]
- Too many options increase regret and decrease happiness with choices made[1]
- Simplifying choices improves decision-making and life satisfaction[1]
- "Maximizers" (who seek the absolute best) suffer more from choice overload than "satisficers" (who seek good enough) — maximizers experience more regret, less satisfaction, and more depression[1]
- In the jam study, 30% of shoppers offered 6 options purchased against 3% offered 24 — a 10-fold difference, the larger display having drawn more people in[2]
- *That result has not replicated and this file said nothing about it until 2026-09-01. A 2010 meta-analysis (Scheibehenne, Greifeneder & Todd) found an overall effect size near zero across choice-overload studies, with moderators mattering; Iyengar has acknowledged the effect is context-dependent, not universal*[2]
- Extensive choice simultaneously increases enjoyment of choosing and frustration/difficulty — these are independent dimensions, not trade-offs[2]
- The mechanism is enhanced responsibility and anticipated regret (not satisficing) — people with too many options feel more responsible for their choice and more anxious about making the wrong one[2]