Manage the gap between perceived and actual similarity
We often like people because we think they're like us — and later discover the gap. Plan for the update.
Why it works
Early attraction is based on perceived similarity, which is necessarily incomplete. As a relationship develops, mismatches between initial perception and actual values or beliefs become visible. Research on the 'fatal attraction' phenomenon (Felmlee, 1995) shows that the very qualities that initially attract can become the qualities that create conflict, partly because initial attraction was based on a projected similarity that did not fully exist. Anticipating this gap reduces the disillusionment that causes early friendships to fail.
How to do it
- Hold your initial positive assessments of new acquaintances as hypotheses, not conclusions.
- In the first months of a new friendship, pay attention to emerging differences as information rather than deal-breakers.
- When you discover an unexpected difference, ask: does this conflict with core values, or just with my initial projection?
- Build friendships with deliberate curiosity about who the person actually is, not just confirmation that they are who you hoped.
Evidence
Research on social projection shows that people systematically overestimate how much others share their views (false consensus effect); Felmlee's fatal attraction research shows that perceived similarity early in relationships often partially constructs rather than discovers actual similarity. (observational)
Fatal attraction research covers romantic relationships primarily; generalization to friendship maintenance is a reasonable inference but not directly established.
Sources
- Felmlee, D. H. (1995). Fatal attractions: Affection and disaffection in intimate relationships. Journal of Social and Personal Relationships, 12(2), 295–311.
- Ross, L. et al. (1977). The false consensus effect. Journal of Experimental Social Psychology, 13(3), 279–301.
Common mistake
Abandoning promising new friendships at the first sign of difference, when the difference was actually the correction of an initial projection rather than evidence of deep incompatibility.
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More practices for The Similarity-Attraction Effect (Donn Byrne)
- Surface genuine shared values and experiences early
Finding real common ground accelerates liking more than surface-level agreement.
- Use self-disclosure to invite similarity discovery
Sharing something true about yourself gives the other person a target to match.
- Distinguish attitude similarity from need complementarity
People attract on shared values but often complement each other on personality traits.
- Use similarity to connect, not to seek validation
Seeking people who agree with everything you believe produces an echo chamber, not a support network.
- Use shared humor as a rapid similarity signal
Laughing at the same things signals a shared world faster than stating shared values.
Related concepts
- The Propinquity Effect (Leon Festinger)
How the layout of your life determines who you become close to
- The Mere Exposure Effect, Made Practical
Familiarity, liking, and the quiet power of repeated presence
- Active-Constructive Responding, Made Practical
The four response styles and the surprising power of celebrating good news