The Paced Auditory Serial Addition Task — Computerized (PASAT-c) is a laboratory measure of distress tolerance used in behavioral research. Participants add consecutive single digits and click the sum, with difficulty increasing across three levels by shortening the inter-stimulus interval.
Originally developed by Carl W. Lejuez and colleagues, the PASAT-c's primary outcome — Level 3 persistence — measures how long a participant continues under escalating cognitive demand before choosing to quit. This platform provides researchers with a free, open-access, standardized web implementation.