Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Perceived Urgency(also: Alert urgency, Urgency perception)
- The subjective sense of immediacy or threat conveyed by an alert, shaped by parameters such as pulse rate, inter-pulse interval, pitch, loudness, and — for tactile signals — vibration intensity and pattern duration. Research on aircraft alarms, hospital alarms, and driver…
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