Research library

Everythingwecite,writtenout.

Each PageLint check traces to a primary source. These are the notes — books, studies, misattributions, and field observations that built the framework.

15 articles · 4 sources · updated May 2, 2026

15 articles

Check articleCL-1

Single dominant H1: what the headline arithmetic actually means

Ogilvy's 80-cents-out-of-a-dollar claim is about concentration, not volume. What it actually argues — and why most landing pages misread it.

Ogilvy · CXL

9 min readMay 9, 2026

Lens overview

The Clarity lens: 8 checks for landing pages that convert

Why every audit starts here — eight measurable checks that tell you whether a visitor knows what you sell within five seconds.

Ogilvy · CXL

14 min readMar 30, 2026

Topic

Cialdini's 7 principles for landing pages (updated 2026)

Reciprocity, scarcity, authority, consistency, liking, social proof, unity. What each one looks like in copy — and how often we get them wrong.

Cialdini

22 min readApr 22, 2026

Topic

Schwartz awareness states explained

Unaware, problem aware, solution aware, product aware, most aware. Mapping each state to the headline you should be writing.

Schwartz

18 min readFeb 5, 2026

Check articleCL-3

Hero passes 'what is this?' in 5 seconds

The CXL Institute five-second test, what it measures, and the seven hero patterns that pass it without effort.

CXL · Schwartz

6 min readJan 9, 2026

Check articleTR-2

Social proof without 'as seen in' logos

Why customer counts beat brand walls for early-stage products — and the three formats that actually move conversions.

Cialdini · CXL

7 min readDec 14, 2025

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