Reaction Time

What it measures

Simple visual reaction time across 20 trials — click when the panel turns green.

Deary, I. J., et al. (2011). A free, easy-to-use, computer-based simple and four-choice reaction time programme. Behavior Research Methods (paradigm reference).

Validity & honesty

Reaction time is highly sensitive to device, browser and time of day — compare trends only on the same machine, and log conditions. Median (not mean) is scored to resist outliers.

Cadence: a retake every 1 day is advised. You can retake anytime — early retakes are scored normally and flagged in trend analysis.

Before you start

• · ~3 min, one sitting
• · untimed — no clock is shown

Your history

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