Definition
Regret Aversion: Decision makers consider not only outcomes but also the regret they would feel if they had chosen differently, and thus tend to avoid choices that might lead to regret—resulting in over-caution, herd behavior, or resistance to change.[1]
Mechanism and evidence
Loomes & Sugden (1982) incorporated regret into utility models, showing that anticipated regret shifts risk preferences.[1] Related to loss aversion: regret is often experienced as a loss.
Consumer decision patterns
Choosing “what everyone buys–to avoid standing out and regretting it; not switching brands or trying new products; excessive hesitation before large purchases. Marketing reinforces anticipated regret with “you won’t regret it–and scarcity.
Mitigation (Selection Logic)
T3 uses regret rate as a measure of selection ability; but excessive fear of regret can block rational need–product matching. Use M5 to separate “reasonable caution–from “regret-aversion-driven rigidity.”
- Clarify your needs and weights; choose by fit, not by “what others choose.
- For reversible decisions, accept some trial and error; use post-purchase feedback.
- Ask “Am I afraid of actually choosing wrong, or of being seen as wrong?— to separate reason from herd behavior.