B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
26%
26% -- qualified leads lift for mid-sized law firm Google Ads (2026)
Using 'Recommended' copy in Google Ads generated 26% more qualified leads for a mid-sized law firm compared to the control version.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
26%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Lead Alchemists
Primary
Tier C
https://www.leadalchemists.com/marketing-psychology/cognitive-biases-marketing/default-effect/ ↗
Source Article
Guide to The Default Effect in Marketing: Description, Psychology, and Examples - Quality Lead Generation From The Lead Alchemists Agency
Guide to The Default Effect in Marketing: Description, Psychology, and Examples
What Is The Default Effect?
The Default Effect is the tendency for people to favour pre-selected options, even when the alternatives on offer are objectively better choices for them. This powerful cognitive bias explains…
Original Research
Lead Alchemists
· Original study ↗
Methodology
A/B test of two Google Ad variations
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
mid-sized law firm Google Ads: 26% qualified leads lift. Source: Lead Alchemists (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/law-firm-recommended-ad-qualified-leads
HTML Embed
<blockquote cite="https://lighthousedata.io/data/law-firm-recommended-ad-qualified-leads" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>26%</strong> -- qualified leads lift for mid-sized law firm Google Ads<br><small>Source: Lead Alchemists (2026) · <a href="https://lighthousedata.io/data/law-firm-recommended-ad-qualified-leads" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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