Definition
Default Effect: When a preset (default) option exists, people tend to accept or keep it rather than actively choosing another; changing the default usually requires extra cognitive effort or an explicit action.[1]
Mechanism and evidence
Johnson & Goldstein (2003) compared opt-in vs opt-out defaults for organ donation: when the default was to donate, consent rates were much higher than when the default was not to donate.[1]
Consumer decision patterns
Auto-renewal defaults, pre-checked add-ons, default mid-tier plans, and default privacy settings all exploit the default effect to increase the chance one option is “chosen–without active deliberation.
Mitigation (Selection Logic)
The default effect is related to status quo bias. Rationally, one should explicitly check whether the default still matches fit and cognitive budget allocation.
- For important decisions (subscriptions, privacy, plans), ask “What would I choose if there were no default?
- Set reminders to review renewals and defaults periodically.
- For high-stakes choices, make “uncheck the default–a required step.