Framework · Influence · Influence
Liking
People prefer to say yes to people they know and like. Besides existing friendship, the book names five sources of liking: physical attractiveness, similarity, compliments, contact and cooperation, and conditioning and association. Requests routed through a friend borrow the friendship.
Plain label: people say yes to people they likeAlso known as: liking, similarity, compliments, association, friend referral
The rule (Ch.5, pp.126-128). The most direct use borrows an existing friendship: hosts selling to friends, referrals in a friend's name (in-t-lk-01, in-t-lk-02, in-t-lk-03).
Five factors INF-M-44 (Influence Ch.5, p.129) (Ch.5, pp.129-152)
- Physical attractiveness, through a halo that colors other judgments.
- Similarity, even on trivial traits.
- Compliments, even when people suspect them.
- Contact and cooperation: contact during competition lowers liking, and shared goals raise it.
- Conditioning and association: feelings spill over onto whatever shows up alongside them, good news and bad (in-t-lk-13, in-t-lk-21).
Reflected glory. People link themselves to winners and distance themselves from losers (Ch.5, pp.148-152), see in-t-lk-27.
The defense INF-M-55 (Influence Ch.5, p.153) (Ch.5, pp.153-155). Notice liking that arrives faster or stronger than the situation warrants, then evaluate the offer separately from the person making it. In a product, that means a plain summary of what you pay and what you get.
Evidence. Similarity, familiarity and attractiveness effects are well documented; people under-report how much they are affected, so measure behavior.
Sources
Influence · Robert Cialdini
Ch.5, p.129 · Ch.5, p.153 · Ch.5, p.126
Source IDs: INF-M-44INF-M-55
Book content is paraphrased, never quoted at length. Last verified October 24, 2026.
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