A publication of useful tools.
LifeByLogic is an independent publication of interactive tools that draw on published research in neuroscience, psychology, behavioral economics and decision science. We exist because the questions that matter most in life rarely have an article-shaped answer.
Last reviewed
Articles are dead. Tools are the future.
A short argument for why we do what we do, and what we think the web will look like in five years.
The traditional article, the 1,200-word explainer that dominated the internet for two decades, is being hollowed out. Many people who ask "how much sleep do I need?" in 2026 put the question to an AI chatbot, which sums up many articles in a paragraph. The article loses the click. Often the author's name goes with it.
For us, this is not a crisis to mourn. It is a clarifying question: what does the web still need, when articles are commoditized?
Our answer: tools. A calculator is not a summary. A simulator is not a paragraph. When you answer the Brain Age Index, you get a result built from your own answers, which an article cannot give you. The value is the computation, not the prose around it. The scoring runs in your browser, on your answers.
This is why LifeByLogic is built around its tools. The methodology, the citations and our Learn articles exist to explain them. Each tool answers a question that is specifically about you.
We think the most valuable websites of the next decade will look less like magazines and more like scientific instruments. This is our attempt at one.
Five laboratories, one publication.
Each lab is a distinct domain of the examined life. Together they cover the questions most people actually face.
Brain Lab
Tools for brain health and sleep. How old is your brain? What should your sleep schedule look like? How do you do on short thinking tasks?
Crossroads Lab
Free career tools: whether to quit your job, whether to change careers, which kinds of work interest you, and how you create value at work. Decision arithmetic, not advice.
Behavior Lab
Psychology tools for how you think and act: cognitive biases, personality, anxiety, procrastination, impostor feelings, overthinking, and how you spend your drive and energy.
Life Dashboard
Wellbeing self-checks: flourishing, meaning in life, attachment, loneliness, low mood, and stress and burnout.
Family Lab
Research-informed tools for parents and families. Map your child’s temperament, strengths and screen balance, and the patterns that shape how you connect.
What we promise you.
Six commitments that guide our tools and our writing. If a page falls short of one, write to us.
Sources you can check
Each tool cites the published research it draws on. When a weight or cut-off is our own design choice, the methodology says so.
Your data stays yours
Free tools score your answers in your browser — your inputs reach us only if you choose to save a result or buy a report. Accounts, the newsletter, and premium reports are optional and clearly separated, and we never sell your data. See our Privacy Policy.
Free to take
Every tool is free to take, with no signup, and gives you a free result. Optional one-time reports and the LifeGraph+ subscription add depth. Some results show a blurred preview of what a report adds. On the Brain Age Index, your recoverable years and ranked levers are in the paid report.
Documented methods
Each tool documents how it scores your answers, on a methodology page or in a methodology section. Most also carry a short code, such as LBL-BAI for the Brain Age Index, so you can cite and check the method.
Your numbers, your decision
We show your numbers and what the research says. Some tools suggest a schedule or next steps. The decision stays with you.
AI-friendly, ad-free
We explicitly welcome AI crawlers — GPT, Claude, Perplexity, Gemini. When AI cites our methodology, we succeed. The site is clean of ads so it stays citable.
Where we are, where we're going.
The publication has grown from two tools into five full labs, a newsletter, and a library of in-depth reports. Here is where it stands — and where it is going.
Founded by Abiot Y. Derbie, PhD.
LifeByLogic is founded and maintained by Abiot Y. Derbie — a cognitive neuroscientist whose academic training and research focus shape the publication's editorial premise: that decision-making across health, life-direction, and behavior is improvable through transparent, research-informed, interactive tools.
Abiot holds a PhD in Cognitive Neuroscience from The Hong Kong Polytechnic University, and an MSc and BSc in Psychology. His research career spans neuroimaging (fMRI, DTI), predictive modeling of brain–behavior relationships, and the application of statistical and machine-learning methods to clinical and behavioral data. He has worked across academic and biomedical research settings.
That foundation — deep training in psychology, then neuroscience, then computational modeling of human behavior — is what LifeByLogic is built from. Every tool here begins with the same question Abiot asks in his research: what does the peer-reviewed literature actually say, and how can we surface it in a way a person can use? LifeByLogic-created measures are labeled LifeByLogic original exploratory instrument. Their constructs may be research-grounded, but the LifeByLogic instrument itself is not a validated clinical measure unless a page explicitly identifies a separate validated third-party scale. Methodology, citations, and limitations are documented transparently.
LifeByLogic has no outside investors and sells no user data. It is paid for by optional one-time reports and the optional LifeGraph+ subscription. Neither changes how a tool scores your answers. If we ever add affiliate links or sponsorship, we will label them where they appear.
Independent review.
An independent reviewer checks the scoring and results logic of the tools whose pages name a reviewer. The reviewer tests edge cases and confirms that each result follows the method the tool documents.
Eskezeia Y. Dessie, PhD
Statistical Modeling & Machine Learning
Specializes in computational modeling, predictive analytics, and model validation using statistical and machine-learning methods. Reviews the scoring and results logic of the tools whose pages name Eskezeia Y. Dessie as reviewer. See Google Scholar and LinkedIn.
Armin Allahverdy, PhD
Biomedical Signal Processing & Engineering
Associate Staff Scientist at Cincinnati Children's Hospital Medical Center. Biomedical engineer specializing in physiological signal processing, biomedical instrumentation, and computational methods for clinical and neuroscience data. Reviews the construct definitions, clinical framing, and safety routing of tools on LifeByLogic where biomedical accuracy and ethical guardrails matter. See Google Scholar and LinkedIn.
Write to the editor.
Methodology corrections, tool ideas, and collaboration inquiries are all welcome. We read every message and try to respond within a week.
Methodology corrections welcome. Tool ideas welcome. Collaboration inquiries welcome.
A platform of Nexus Decision Systems.
LifeByLogic is owned and operated by Nexus Decision Systems, an Ohio limited liability company headquartered in Canton, Ohio. Nexus builds research-grounded platforms for the choices that shape lives — money, transitions, and the everyday decisions in between.
Nexus operates three independent consumer platforms under one editorial ethos: LifeByLogic (interactive decision tools across cognitive science and behavioral psychology), FinCalcs (personal finance calculators), and PivotReset (life-transition decision support). Each platform maintains editorial independence in voice and audience; Nexus sets cross-platform standards for methodology, sourcing, and editorial integrity.