A companion for your cognitive life.
A growing collection of evidence-based tools for understanding and optimizing cognitive performance, sleep, memory, and mental health. Each instrument is built on peer-reviewed neuroscience and runs entirely in your browser. Nothing is stored.
Measure what matters — then change it.
Each tool is a standalone research-grade instrument. Inputs stay local. Results travel only as far as you choose to share them.
Brain Age Index
The Brain Age Index estimates the modifiable portion of your brain-age gap across 6 evidence-based domains (25 items) — built on the 2024 Lancet Commission on Dementia Prevention and MRI Brain Age Gap research from the UK Biobank.
LBL Sleep-Cognition Optimizer
Measures your behavioral sleep patterns and prescribes a personalized 24-hour schedule. Computes social jetlag, Sleep Regularity Index estimate, and—when paired with the LBL Chronotype Profile—your biology-behavior gap. Grounded in Roenneberg 2003 (MSFsc), Arab 2024 (SJL), and Windred 2023 (SRI mortality evidence).
Sleep Need Calculator
How much sleep do you need by age? Built on AASM and National Sleep Foundation consensus guidelines, with weekly sleep debt and a lifespan view across nine age brackets.
Cognitive Reserve Estimator
Six-domain estimator of accumulated cognitive reserve. Synthesized from Stern's framework, the Cognitive Reserve Index questionnaire, Verghese's NEJM leisure research, the 2024 Lancet Commission, and 100+ underlying studies. Evidence-weighted scoring with full provenance documented on the tool page.
LBL Chronotype Profile
Find your biological/trait chronotype with a 14-item LBL-original assessment grounded in 2019–2025 chronobiology — Jones 2019 GWAS (n=697,828), Taillard 2004 age calibration, and modern chronotype-DLMO research. Continuous 0–100 score, age-sex calibrated, with estimated DLMO window.
Adult ADHD Test
A free ~7-minute screen using the LBL Adult ADHD Symptom Inventory (v2.0), a 20-item LBL-original inventory across three domains: attention & executive function, hyperactivity & impulsivity, and emotional self-regulation. Returns a tri-domain profile, severity bands, and one of 7 research-grounded archetypes mapping pattern to evidence-based pathways. A screen, not a diagnosis.
Adult Autism Test
A free ~8-minute adult autism self-inventory using the LBL Adult Autism Self-Inventory (v2.0), a 30-item LBL-original instrument across four trait constructs (social-cognitive, sensory, routine & repetition, focus & depth) plus masking and emotional-processing context indices. Returns a trait profile, four resonance bands, and one of six lens profiles. A self-inventory, not a diagnosis.
Brain Vitality Index
A free ~14-minute live cognitive performance test. Seven short tasks — adapted from established paradigms (Corsi span, Eriksen flanker, Symbol–Digit, task-switching, paired-associate) — measure seven domains and translate them into your Brain Vitality Age and a cognitive archetype. An optional report turns your scores into a personalized written analysis. A performance snapshot, not a diagnosis.
How Brain Lab tools are built.
Three commitments shape every instrument in this laboratory. Without them, none of this matters.
Peer-reviewed sources only
Every factor, every weight, every recommendation traces back to published research in journals like The Lancet, Alzheimer's & Dementia, Nature, or Sleep Medicine Reviews. We cite explicitly — no vague "studies show" language.
Named methodology
Each tool publishes its full methodology under a unique identifier (LBL-BAI, LBL-SCO). If you want to challenge our weights, cite our method, or reproduce our calculations — every step is documented in plain language.
Zero data retention
Every calculation runs locally in your browser. Nothing you enter is sent to our servers, stored, or tracked. You can verify this by opening your browser's developer network tab while using any tool.
Read the methodology.
Each tool publishes its full methodology under its own page — the validated framework, the variables measured, the algorithm, the limitations, and the peer-reviewed references behind every claim.
2024 Lancet Commission framework, 14 modifiable risk factors, scoring algorithm.
Mid-sleep (MSFsc) and social-jetlag computation, Sleep Regularity Index estimate, 24-hour schedule logic, validation strategy, and references.
AASM and NSF consensus statements, scoring algorithm, validation studies, score band rationale, and limitations.
Six-domain construction, scoring algorithm pseudocode, validation strategy, score-band derivation, and limitations documented in 11 sections.
14-item LBL-original framework, 0–100 continuous scoring with age-sex calibration, estimated DLMO window, validation strategy, and limitations.
20-item LBL-original inventory, three domains (attention, hyperactivity, emotional self-regulation), 4 severity bands, 7 archetypes, validation roadmap and limitations documented in full.
30-item LBL-original instrument, four trait constructs plus masking and emotional-processing context indices, four resonance bands, six lens profiles with salience-based routing, scoring algorithm, validation roadmap and limitations documented in full.
Seven cognitive paradigms (Corsi span, Eriksen flanker, Symbol–Digit, task-switching, paired-associate, within-session RT drift), the age-adjustment and scoring pipeline, the Brain Vitality Age, provisional norms, limitations, and references.
Other laboratories in the publication.
LifeByLogic is organized into four labs, each focused on a different dimension of the examined life.
Crossroads Lab
Monte Carlo simulators and multi-variable calculators for life's biggest forks — career, education, relocation.
Behavior Lab
Behavioral economics and cognitive psychology tools to detect biases, build better habits, and resist manipulation.
Life Dashboard
Your personal analytics engine. Track sleep, mood, spending, and productivity — and surface the patterns hiding in plain sight.
More evidence-based tools are in active development for this lab. Follow The Brain Matters to hear when they ship.
Frequently asked questions.
What does the Brain Lab measure?
The Brain Lab houses tools that surface signals about cognitive health, brain aging, sleep–cognition relationships, memory, and attention. Each tool implements a validated instrument or framework from the peer-reviewed neuroscience and cognitive aging literature.
Are the Brain Lab tools peer-reviewed?
The methodologies the tools implement are peer-reviewed. Sources include the 2024 Lancet Commission on dementia prevention, the chronotype research literature in the journal Sleep, and cognitive performance studies from PNAS and Nature Mental Health. The tools themselves are independently reviewed for analytical correctness by Eskezeia Y. Dessie, PhD (Indiana University School of Medicine).
Are the tools clinical instruments?
No. The Brain Lab tools are educational decision-support tools. They surface signals based on validated research instruments but do not diagnose any cognitive or medical condition. They are not a substitute for evaluation by a licensed healthcare professional. If you are concerned about your cognitive health, please consult a qualified provider.
How are results calculated?
Each tool publishes its complete methodology on the tool page. We disclose the items measured, the scoring procedure, the reference data used for benchmarking, the limitations, and the citations. Tools are versioned; significant methodology updates change the tool version and are logged in the methodology section.
Do my answers stay private?
Yes. Brain Lab tools run locally in your browser. Your inputs are not transmitted to our servers. We do not collect, store, or sell your responses. See our Privacy Policy for full details.