B
Evidence Grade B
Graded
under review
Safe to Cite
Current
16%
16% -- organic traffic decrease for organic sessions (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
16%
Unit
Percentage
Data Vintage
2026
Entity
Geography
US
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Score breakdown
Extraction
50
Source Trust
50
Citation Chain
90
Independence
30
Methodology
30
Freshness
95
Sources (4)
SearchPilot
Primary
Tier C
https://www.searchpilot.com/resources/case-studies/seo-split-test-lessons-removing-numbers-from-arti… ↗
Source Article
20 reasons you should include numbers in your titles for SEO
Start here: how our SEO split tests work
If you aren't familiar with the fundamentals of how we run controlled SEO experiments that form the basis of all our case studies, then you might find it useful to start by reading the explanation at the end of this article before digesting the details of the…
Also cited by
niemanlab.org
https://www.niemanlab.org/
2026-08-16
forbes.com
https://www.forbes.com/
2026-08-16
clickthrough-marketing.com
https://www.clickthrough-marketing.com/
2026-08-16
Original Research
SearchPilot
· Original study ↗
Segmentation
IndustryMedia
RegionUS
RoleSEO Specialist
Channelsearch
Cite this stat
Plain Text
organic sessions: 16% organic traffic decrease. Source: SearchPilot (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/seo-split-test-organic-traffic-decrease
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<blockquote cite="https://lighthousedata.io/data/seo-split-test-organic-traffic-decrease" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>16%</strong> -- organic traffic decrease for organic sessions<br><small>Source: SearchPilot (2026) · <a href="https://lighthousedata.io/data/seo-split-test-organic-traffic-decrease" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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