Reaction Time

Reaction time (RT) is the interval between the onset of a stimulus and the initiation of a motor response to that stimulus. It reflects the combined duration of perceptual encoding, central decision processes, and motor execution. Donders (1869) introduced the subtractive method to isolate these stages by comparing simple, choice, and go/no-go variants, a framework that still underpins modern chronometric research.

Reference: Donders, 1869. The NeuroRank implementation holds the canonical form and scales interference via task-irrelevant stimulus density.

1. Reacting to a flashbang wear-off in Counter-Strike 2, where the first player to acquire a shot after the haze fades usually wins the duel.
2. Counter-strafing against a peeker in Valorant, where the window to land the first accurate shot is often under 200 milliseconds.
3. Dodging a skillshot such as Blitzcrank's hook in League of Legends, which asks for rapid detection of the projectile plus a lateral move input.

NeuroRank's Reaction module runs three trial types in sequence: simple RT, choice RT, and go/no-go. Mean simple RT is converted to a percentile score on the Reaction Speed dimension, while choice accuracy and go/no-go commission errors feed Decision Quality.