Liking
Date: 2026-08-17
People say yes more readily to people they like, and liking is driven by similarity, familiarity and attractiveness far more than by merit. It’s the weakest of the persuasion principles in an interface and the strongest in a relationship.
Liking is the tendency to be persuaded by sources we find likeable. The drivers are well-catalogued and slightly deflating:
- Similarity — “people like me”
- Familiarity — repeated exposure
- Attractiveness — physical and aesthetic
- Compliments — even transparently insincere ones
- Co-operation — working towards a shared goal
- Association — pairing with something already liked
Similarity is the usable one
The others are hard to design for; similarity isn’t.
GENERIC SIMILAR
"loved by our "23 reviews from
customers" customers with
sensitive skin"
a model who looks customer photos of
like a model people who look like
the buyer
"for everyone" "for trade customers
buying for a clinic"
Specificity of audience is what makes similarity work, and it’s the same mechanism that makes segmented Social Proof stronger than aggregate social proof.
Familiarity, and the mere exposure effect
Repeated exposure increases liking, independent of any information gained. It’s the honest mechanism behind brand advertising and the reason retargeting works at all beyond reminding.
The interface version:
CONSISTENCY the same patterns,
colours and voice across
every touchpoint
→ each visit adds
familiarity rather
than resetting it
— Design Systems
RECOGNISABILITY an email that obviously
comes from you
See: Design Systems
Inconsistency spends this. A site, an email and a packing slip that look like three companies accumulate no familiarity between them.
Aesthetics, and the usability halo
The finding that makes this commercially relevant: attractive interfaces are perceived as more usable, sometimes independently of whether they are.
It’s one of the better-evidenced findings in this note. Kurosu and Kashimura tested 26 variations of an ATM interface with 252 participants in 1995, and found aesthetic appeal correlated more strongly with perceived ease of use than actual ease of use did. Tractinsky replicated it in a different language and culture with tighter controls, and the correlation came out stronger — which is unusual in this literature and worth noting given how much of it didn’t replicate.
CONSEQUENCE 1 visual quality buys
tolerance for friction
CONSEQUENCE 2 ugly-but-usable tests
badly in perception
measures
CONSEQUENCE 3 a beautiful site can
mask real usability
problems in research
— participants blame
themselves
That third one is a research hazard. Participants struggling with an attractive interface frequently attribute the failure to themselves, so you get the behaviour without the complaint. Watch what they do, not what they say — Usability Testing.
Where it’s weak
Liking is the least useful persuasion principle for a transactional interface.
- It doesn’t survive a functional failure. Nobody likes a brand enough to complete a broken checkout
- It’s slow. Familiarity accrues over many exposures; it isn’t a lever you pull this quarter
- It’s hard to attribute. Brand affinity’s contribution to a conversion is not isolable in analytics, which is why it loses budget arguments to channels that are — Incrementality Testing
- In a specialist category, Authority outperforms it. For a health or professional purchase, credible expertise beats warmth
Where it earns its place
RETENTION liking is a repeat-purchase
lever more than an
acquisition one
— Retention and Churn
TOLERANCE liked brands are forgiven
mistakes that unliked ones
aren't
SERVICE a human, named, responding
warmly — the strongest
version available
COMMUNITY shared identity, which is
Unity rather than
liking, and stronger
See: Retention and Churn · Unity
The honest position
Don’t design for liking directly. Designing to be liked produces the tone-of-voice excess that customers find grating — the over-familiar microcopy, the forced personality in an error message.
Design to be useful, consistent and human, and liking follows. The interface goal is that nothing gets in the way; the brand goal is that the person recognises you next time — Voice and Tone.