Related Experiment Video
Updated: Feb 10, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
Published on: August 8, 2019
Fatigue-life distributions for reaction time data
Mauricio Tejo1, Sebastián Niklitschek-Soto2, Fernando Marmolejo-Ramos3
11Facultad de Ciencias Naturales y Exactas, Universidad de Playa Ancha, Valparaíso, Chile.
Abstract:
The family of fatigue-life distributions is introduced as an alternative model of reaction time data. This family includes the shifted Wald distribution and a shifted version of the Birnbaum-Saunders distribution. Although the former has been proposed as a way to model reaction time data, the latter has not. Hence, we provide theoretical, mathematical and practical arguments in support of the shifted Birnbaum-Saunders as a suitable model of simple reaction times and associated cognitive mechanisms.
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