How it works
Three steps to a verified score.
Question
The system presents a calibrated question. Your response is analyzed for correctness, speed, and confidence.
Adapt
The algorithm adjusts difficulty in real-time. Correct answers raise the bar. Mistakes trigger focused review at a lower level.
Certify
When enough data converges on your true ability, the assessment ends. Your score becomes an immutable credential.
Assessment types
Four assessments. One goal: truth.
Diagnostic
Rapid skill-level detection. The system pinpoints your current proficiency in under 10 minutes, identifying strengths and gaps.
Competency
Prove mastery at a specific level. Pass the threshold and your competency is recorded as verifiable evidence in your passport.
Certification
Formal credential for your passport. A comprehensive assessment that evaluates depth and breadth, producing a signed certificate.
Benchmark
Compare your ability against the global population. See exactly where you rank and track your percentile over time.
Adaptive engine
Difficulty that responds to you.
The adaptive algorithm continuously recalculates your estimated ability after every response. Questions get harder when you succeed and easier when you struggle. The result is a precise measurement in fewer questions than fixed tests.
Real-time recalculation after every answer — no wasted questions
Item Response Theory (IRT) ensures each question maximizes information gain
Converges on your true ability 40% faster than traditional fixed-length tests
RESULTS
Every assessment result becomes verifiable proof in your passport.
Verified Assessment
React — Verified
Score: 84% · 24/28 questions
Proof pipeline
Results that become credentials.
Assessment results are not just scores. They are verifiable evidence events that permanently strengthen your skill passport. Every assessment you complete increases your credibility and unlocks higher verification tiers.
Assessment scores recorded as immutable evidence events in your passport
Results contribute directly to your SCI score with weighted significance
Higher assessment scores accelerate progression through verification tiers
Assessment Complete
Just now
For hiring teams
Assess candidates with real data.
Send adaptive assessments to candidates via API or dashboard. Get structured, comparable results that go beyond resume claims. Every assessment produces the same verifiable credential format.
Invite candidates to skill-specific assessments via email or API
Compare candidate scores on a standardized, bias-resistant scale
Results auto-populate the candidate's Lemma passport for instant verification
How Lemma assessments compare.
See how adaptive assessments stack up against traditional testing methods.
| Feature | Lemma Adaptive | Traditional tests | Coding challenges |
|---|---|---|---|
| Adaptive difficulty | |||
| Practical exercises | |||
| Verifiable credentials | |||
| Contributes to SCI | |||
| Real-time feedback | |||
| Multi-format questions |
Adaptive difficulty
Every question is calibrated to your current ability. Always challenging, never frustrating.
Builds your credibility
Assessment results directly strengthen your Skill Credibility Index. Proof, not claims.
Verifiable credentials
Results become signed certificates in your passport, visible to employers worldwide.
Getting started
Start learning with peers
Join Lemma to find skill-matched partners, complete sessions, and build a verified portfolio — all for free.
Maya R.
94% match · React & Python
Build with our API
Integrate Lemma's skill verification into your hiring pipeline, LMS, or talent platform with our REST API and SDKs.
Start proving what you know.
Early access is rolling out for individuals and teams. No credit card, no PDFs — just the things you made, made visible.