Reflex Profile

Treat it as a quick snapshot, not a clinical measurement. Reflex Profile is five short tasks in a browser — useful for self-discovery and comparison, not for diagnosis. Your score in a single session reflects your device, your network, how rested you are, whether you've had caffeine, and dozens of other factors. For a more stable picture, run the battery two or three times across different days and look at the pattern, not the single number.

Reaction time is the gap between a stimulus appearing and you responding to it. The chronometry tradition starts with Donders in 1868 and runs through Hick (1952), Posner (1967), and Logan (1994). Reaction time is one narrow window into how the perceive–decide–act loop works under time pressure. It matters in driving, gaming, sports, and emergency response — but it is one component of cognition, not a measure of intelligence, attention overall, or general ability.

Touchscreens add roughly 30–80 ms of latency vs a wired mouse; cellular networks add 20–100 ms vs ethernet; lower-refresh-rate displays (60 Hz vs 144 Hz) add up to 16 ms per frame. Combined, mobile users systematically score 50–200 ms slower on the exact same sub-tests. We show device class next to your score so you can compare honestly. Per-device leaderboard filtering is a v2 plan.

That's the Metronome profile — and it is a real result, not a missing one. Trial-to-trial consistency is a separate capability from peak speed, and in many real-world domains it matters more. A reliably good engineer, surgeon, or driver tends to be a Metronome. If your numbers are also high across the five, you may sit at the boundary between Metronome and Falcon.

Mildly. Direct practice on a specific reaction task yields about 5–10 ms of improvement that stabilizes after a few sessions and is largely task-specific. Sleep, hydration, caffeine, and being warmed up have a much larger same-day effect — easily 30–50 ms — and that is what most of the day-to-day variation in your scores is actually measuring. We do not claim that this test 'trains your brain' or improves real-world performance, and you should be skeptical of products that do.

Per-sub-test leaderboards exist and are filtered server-side against impossible-human submissions (faster than 100 ms repeatedly, automation patterns). We deliberately don't lead with a single cross-device global leaderboard because input-device variance — touchscreen vs mouse, 60 Hz vs 144 Hz display, wifi vs cellular — makes that comparison noisy enough to be misleading. Device class is shown next to every score.

HumanBenchmark is one single-test page per task (their Reaction Time is the famous one) — fast, free, but no composite across tasks and no profile, just a number. BrainHQ is a paid subscription brain-training product oriented around exercises and longitudinal scoring; not designed as a one-session profile. Reflex Profile sits in between: a free five-test battery in one sitting that returns one shareable archetype (Hummingbird, Falcon, Metronome, Sentinel, or Sleeper) plus per-sub-test percentile bars.

No, and please do not use it as one. Reflex Profile is an entertainment self-discovery experience, not a medical device. It does not screen for ADHD, post-concussion syndrome, dementia, or any other condition. If you have concerns about your attention or reaction speed in daily life, please talk to a qualified clinical professional — a neurologist or neuropsychologist can run validated instruments that this test cannot replace.