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---
title: "Default Bias"
type: concept
tags: [behavioral-psychology, ux, nudge, persuasion]
last_updated: 2026-04-20
---
## Definition
默认偏差Default Bias指用户倾向于接受预置选项而不主动修改的行为心理倾向。在软件交互中通过预设默认行为或预填内容降低用户决策摩擦提高行动完成率。
## Mechanism
1. **预填内容**:系统自动生成回复/草稿,用户只需确认或修改
2. **预选选项**:智能推荐最佳选项,用户一键接受
3. **默认同意**:预勾选最优行为选项,用户需主动取消而非选择
## Applications
- 邮件回复草稿自动生成,一键发送
- 表单字段智能预填
- 隐私设置默认最优选项
- 通知频率默认静音,用户按需开启
## Related Concepts
- [[Nudge Theory]]:推力理论的组成部分
- [[Cognitive Load Reduction]]:通过减少决策选项降低认知负荷
- [[Gamification]]:可与游戏化结合增强默认选项接受率
## Source
- [[Behavioral Nudge Engine]] — 核心应用场景