What is it in simple terms?

Most people leave the pre-ticked box as it is.

Easy opt-out and transparency are the usual safeguards.

Default Effect

🧠 Psychology By CampusDown Wiki Editorial Team Last updated October 27, 2026

The default effect is the tendency to accept whatever option applies if no active choice is made, so that the choice of default strongly shapes outcomes.

Contents

1. Key cases
2. Mechanisms
3. Nudges and ethics
4. FAQ
5. References

Key cases

Organ donation (Johnson & Goldstein, 2003) and auto-enrolment (Madrian & Shea, 2001), tied to status quo bias.

Mechanisms

Effort, endorsement and reference points (Dinner et al., 2011); choice overload amplifies; meta-analysis by Jachimowicz et al. (2019).

Nudges and ethics

A core nudge (Thaler & Sunstein, 2008; Thaler & Benartzi, 2004), criticised as manipulative or paternalistic.

FAQ

What is it in simple terms?: Most people leave the pre-ticked box as it is.
Is it manipulation?: Easy opt-out and transparency are the usual safeguards.

Sources reviewed: 2026-10-26

References

Johnson, E. J., & Goldstein, D. (2003). Do defaults save lives? Science, 302(5649), 1338–1339. The landmark study showing organ-donor rates depend on the default.
Madrian, B. C., & Shea, D. F. (2001). The power of suggestion: Inertia in 401(k) participation and savings behavior. Quarterly Journal of Economics, 116(4), 1149–1187. Shows automatic enrolment sharply raises pension participation.
Samuelson, W., & Zeckhauser, R. (1988). Status quo bias in decision making. Journal of Risk and Uncertainty, 1(1), 7–59. Documents status quo bias, a psychological root of default effects.
Dinner, I., Johnson, E. J., Goldstein, D. G., & Liu, K. (2011). Partitioning default effects: Why people choose not to choose. Journal of Experimental Psychology: Applied, 17(4), 332–341. Separates effort, implied endorsement and reference-point mechanisms.
Jachimowicz, J. M., Duncan, S., Weber, E. U., & Johnson, E. J. (2019). When and why defaults influence decisions: A meta-analysis of default effects. Behavioural Public Policy, 3(2), 159–186. A meta-analysis of when defaults matter most.
Thaler, R. H., & Benartzi, S. (2004). Save More Tomorrow™: Using behavioral economics to increase employee saving. Journal of Political Economy, 112(S1), S164–S187. A program automatically saving future raises, applied default design.
Thaler, R. H., & Sunstein, C. R. (2008). Nudge: Improving decisions about health, wealth, and happiness. Yale University Press. Presents defaults as a core choice-architecture tool.

Reports and materials that use this theory (Korean)

There are no materials dedicated to this theory yet, but you can search related reports in the CampusDown library (Korean).

Find more reports · Search '기본값 효과' on CampusDown →

NudgeWhat is a nudge? Thaler and Sunstein’s choice architecture, how default settings boosted 401(k) enrollment and organ-donor consent, examples from public policy, the difference between nudges, sludge and dark patterns, and key criticisms.📈 Economics Status quo biasSamuelson and Zeckhauser's status quo bias, how defaults shape organ donation and 401(k) enrollment, why we stick with what we have (loss aversion, regret avoidance), and how nudges use it for good.🧠 Psychology Choice OverloadWhat choice overload is: too many options leading people to defer or give up on choosing and to feel less satisfied. Covers the jam study, retirement fund research, Schwartz's paradox of choice and maximizers, a null meta-analysis and one identifying moderators.🧠 Psychology Maslow's Hierarchy of NeedsMaslow's hierarchy of needs explained: definition, the five levels, deficiency vs. growth needs, the pyramid myth, empirical criticisms and limitations, report examples for social work, nursing and business, and references.🧠 Psychology

Latest ArticlesView all ›

New guides for college study and assignments (Korean)

This article was last updated on October 27, 2026. It is based on widely recognized original works and textbooks; when citing it in a paper, please check the original sources listed in the references.