B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
26.1%
26.1% -- false positive rate from early peeking for A/B tests (2026)
Checking A/B test results early and stopping increases the chance of a false win to 26.1%.
- Applies when checking test results early and stopping when seeing promising results
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
26.1%
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
kirro.io
Primary
Tier C
https://kirro.io/ab-testing-software ↗
Source Article
Best A/B Testing Software 2026: 13 Tools Compared | Kirro
Kirro, VWO, and Optimizely lead the pack for most teams. But the right A/B testing software depends on your traffic, budget, and willingness to tinker. What works for a 200-person company with a dedicated testing team is overkill for a solo founder with 30 minutes between meetings.
We’ve tested, use…
Original Research
kirro.io
· Original study ↗
Methodology
Statistical claim cited in article
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
A/B tests: 26.1% false positive rate from early peeking. Source: kirro.io (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/early-peeking-false-win-rate
HTML Embed
<blockquote cite="https://lighthousedata.io/data/early-peeking-false-win-rate" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>26.1%</strong> -- false positive rate from early peeking for A/B tests<br><small>Source: kirro.io (2026) · <a href="https://lighthousedata.io/data/early-peeking-false-win-rate" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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