Scientific claims link to peer-reviewed papers or primary research sources whenever possible.
ReactionTester Research
Reaction time, measured carefully.
Evidence-based explanations of human reaction time and browser measurement. We separate peer-reviewed evidence from our own observations, describe limitations, and link to the underlying sources.
How we publish
Browser reaction tests measure performance under a particular setup. They are not neurological or medical tests.
Display, input hardware, browser timing, attention and task design can all influence a recorded score.
Library
Start with the measurement itself
What Does an Online Reaction Time Test Actually Measure?
Why a browser score is not a pure measure of “brain speed,” what happens between stimulus and click, and where device latency enters the measurement.
Read the evidence guide →