Triadic Closure
Updated 2026-08-02
INTRODUCTION
English translation pending.
CORE DEFINITION
Triadic closure describes the tendency for a tie to form between two people who already share a mutual connection. The mechanism rests on opportunity, trust, and incentive: shared contacts create chances to meet, mutual friends vouch for reliability, and a common acquaintance raises the cost of betraying either party. Closure produces dense clusters and explains why tightly knit groups develop. Key qualification: dense closure also reduces access to novel information, which is why weak ties across clusters matter for opportunity.
SCAFFOLDING EFFECT
Reduce cognitive load
- Close the triangle: introduce two contacts who should know each other and let mutual trust do the work. - Read cluster density: use how closed a group is to predict how much outside information reaches it. - Bridge outward: add weak ties deliberately once a cluster stops bringing in new ideas.
Anchor fast decisions
A shared acquaintance creates both opportunity and obligation. The two parties meet more often, and each has reputational reason to treat the other fairly because a mutual friend can observe and sanction the interaction. Where those conditions hold, the missing tie tends to form, which makes triangles the stable building block of dense social structure.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E4%B8%89%E5%85%83%E9%96%89%E5%8C%85verified
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