Try four of the most-cited cognitive tests in psychological research — the N-back, Stroop, Sternberg, and Go/No-Go. Free, no signup, takes about 90 seconds each. See how your working memory, attention, and inhibitory control compare to published scientific benchmarks.
Each test isolates a different mental ability — working memory, attention, inhibitory control, memory search — and has been used in thousands of peer-reviewed studies. Pick one to begin, or work through the whole battery. Your results are compared against published scientific benchmarks so you can see how you stack up.
Can you hold and update information in your mind? Watch for letters that repeat after a delay — the hallmark test of working memory.
Can you override an automatic response? Name the ink color, not the word — a 90-year-old test that still trips up the sharpest minds.
How fast does your mind scan memory? Memorize a set, then judge if a probe was in it. Your reaction time reveals the search rate.
Can you stop yourself? Press for most letters, but withhold for the one that says "no." A clean measure of the brain's brakes.
The N-back, Stroop, Sternberg, and Go/No-Go aren't gimmicks — they're four of the most replicated paradigms in cognitive psychology, used in tens of thousands of peer-reviewed studies on attention, working memory, executive function, and impulse control. They've been used to study everything from ADHD and aging to pilot fatigue and driver distraction, because they isolate specific cognitive abilities cleanly enough that small differences become measurable.
Taking them online gives you a snapshot of how your brain handles each demand — and crucially, your results are compared against published benchmarks from healthy adult populations. You won't get a diagnosis (no online test can give you that), but you will see roughly where you fall and what each measure represents.
Every test is based on a published paradigm from the cognitive science literature, with tier benchmarks drawn from peer-reviewed studies of healthy adults.
No account, no signup, no tracking of your scores. Everything runs locally in your browser — your data never leaves your device.
Start at the standard level used in research, then try harder versions to see how performance changes when cognitive load increases.
Every test ends with a full benchmark breakdown — reaction time, accuracy, error rates, and consistency — compared against published norms.
In a research setting, behavioral scores like accuracy and reaction time are only part of the story. The brain and body produce a stream of physiological signals during cognitive tasks — pupils dilate as working memory load rises, EEG shows characteristic waveforms (the N200 and P300) when inhibition is required, skin conductance spikes during cognitive conflict, and facial micro-expressions reveal effort that participants don't consciously report.
iMotions is the leading platform for combining these biosensors with cognitive paradigms in a single synchronized timeline. Researchers in human factors, UX, neuroscience, marketing, automotive, and education use it to measure what people actually experience during demanding tasks, not just what they can report afterwards. Learn how iMotions works →
The paradigms themselves are scientifically validated — the N-back, Stroop, Sternberg, and Go/No-Go are foundational tasks in cognitive psychology with tens of thousands of citations. The browser-based versions here use the same logic and parameters as published research.
However, browser-based tests have small timing imprecisions (about 5–15 ms) compared to lab equipment, so individual scores should be interpreted as a fun snapshot rather than a clinical assessment. For diagnostic or research-grade testing, a controlled environment is required.
Each test reports several measures — typically accuracy, reaction time, and a paradigm-specific signature (the Stroop effect, the N-back d-prime, the Sternberg search slope, the Go/No-Go commission rate). Your scores are compared against tier benchmarks drawn from published studies of healthy adults.
Falling in the "Average" or "Benchmark" tier is normal and expected for most measures. Individual variation is large, and a single short test session can be affected by fatigue, distraction, time of day, and how recently you've taken caffeine.
Each test runs for about 90 seconds at the Standard difficulty level, plus 30–60 seconds reading the instructions. You can complete the full battery of four tests in under 10 minutes.
Yes — try them at different difficulty levels, at different times of day, or after specific activities (like exercise, a meal, or a stretch of deep work) to see how your performance varies. The N-back in particular gets noticeably easier with practice as you internalize the rule, which is itself an interesting phenomenon researchers study.
Brain training apps gamify cognitive tasks and promise to improve general intelligence — claims that the scientific evidence does not strongly support. This isn't a training app. It's an educational demonstration of the actual tests researchers use to measure cognitive abilities, with honest benchmarking and a clear explanation of what each measure represents.
No. Everything runs in your browser. There's no account, no server-side storage of scores, no tracking pixels watching your results, and no data sent anywhere. Refresh the page and everything is gone.