Brain Lab
Seven short, browser-only demonstrations of classic findings in cognitive science — reaction time, Stroop interference, working-memory span, spaced recall, visual perception, spatial hearing, and pitch. No accounts, no uploads, no data leaves your device.
What to expect
- Every demonstration runs entirely in your browser with no data collection.
- Each one pairs the interaction with the method and the published evidence.
- These are teaching tools, not tests: they do not assess ability or health.
- Audio demonstrations only start after you explicitly press Start.
Demonstrations
Visual-Motor Latency
Reaction Time
Measure how long it takes you to convert a visual signal into a finger movement — the classic simple reaction-time paradigm, run entirely in your browser.
Response Interference
Stroop / Selective Attention
Name the ink colour while ignoring the word. The Stroop effect is one of the most reproducible findings in cognitive psychology — feel it for yourself.
Short-Term Maintenance
Working Memory Span
Hold a growing sequence in mind and reproduce it. A browser version of the classic span task that illustrates why working memory is described as sharply limited.
Retrieval Practice
Spaced Recall
A miniature spaced-repetition engine that shows why retrieving information beats re-reading it — and why spacing the retrievals matters more than total study time.
Contrast & Change Detection
Visual Perception
Find the one patch that differs, and watch how quickly a change becomes invisible when a blank frame interrupts it. Two short demonstrations of how construction-heavy vision really is.
Auditory Localisation
Spatial Hearing
Using two ears, the brain infers where a sound comes from. This demonstration pans a locally generated tone and asks you to say which side it came from.
Pitch Perception
Frequency & Hearing
Sweep a locally generated tone across the audible range and hear where your equipment, your ears, and your attention start to disagree with the physics.
Sound, Emotion and Vision in 3D
Soundscape Visualizer Studio
Twelve scenes synthesised live in your browser and rendered as a volumetric WebGL scene that moves with the sound: six natural environments — ocean swell, forest rain, dawn chorus, distant thunder, night crickets, deep drone — and six emotional states built from the acoustic markers of affect: elation, fury, sorrow, leaden low mood, mania and serenity.
Frequently asked questions
Do the Brain Lab demos measure my intelligence or cognitive health?
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No. They demonstrate well-documented cognitive effects. Results shift with your device, screen, input latency, sleep, and attention, and they cannot assess intelligence, ability, or any clinical condition.
Is any of my data stored or uploaded?
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Nothing is uploaded. A couple of demonstrations optionally keep a personal best or a practice queue in your own browser's local storage, and each provides a reset button.
Why do the audio demos need me to press Start?
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Browsers require an explicit user gesture before audio can play. Pressing Start creates the audio context locally; leaving the page shuts it down.