About Reaction Time Test
Our mission
Reaction Time Test is an independent suite of free cognitive benchmark tools. Every test -- reaction time, the chimp test, number memory, sequence memory, visual memory, and aim -- is based on established research in psychology and neuroscience, and each runs entirely in your browser with no account and no data collection.
The tools use the browser's performance.now() clock for precise timing, and your scores stay on your device -- nothing is uploaded or stored on a server.
The research behind each test
- Reaction time -- Hick's Law (Hick, 1952) and established simple-reaction-time norms.
- Chimp test -- Inoue & Matsuzawa (2007), Current Biology.
- Number memory -- Miller (1956), "The Magical Number Seven, Plus or Minus Two."
- Sequence memory -- Corsi (1972) block-tapping task and Baddeley & Hitch's (1974) working-memory model.
- Visual memory -- the visuospatial sketchpad (Baddeley & Hitch, 1974) and Sperling (1960) on iconic memory.
- Aim test -- Fitts's Law (Fitts, 1954).
Who writes this
Marcus Delaney writes about reaction time, working memory, and processing speed, translating the peer-reviewed cognitive-psychology literature into plain language. He reviews the research behind each tool on this site and updates the guides when the evidence changes.
Editorial standards
Every tool and guide is independently written and fact-checked. We cite the original studies by author and year, verify that each test behaves as described, and note when a page was last reviewed. We are not affiliated with any brand or product mentioned. These tests are for education and self-tracking -- they are not medical or diagnostic instruments.
Contact
Questions or corrections? Email us at admin@reactiontimetest.io or visit the contact page.