Sensor-free digital vigilance task: event-level behavioural dataset

Event-level behavioural data from a sensor-free digital adaptation of the Mackworth Clock Test. Forty adults each completed a single 15-minute session containing 18 critical target events, yielding 720 target-level observations. The dataset comprises the per-event outcome and response latency for every participant, together with a derived participant-level feature table. Full column definitions, the task protocol and important caveats on the interpretation of timeout values are given in README.md.