Circadian Performance Simulation Software (CPSS) 1.2

The Circadian Performance Simulation Software (CPSS) is designed to predict the effects of sleep/wake schedules and light exposure on the human circadian pacemaker, and the combined effects of circadian phase and homeostatic sleep pressure on cognitive performance and subjective alertness. The alertness and performance predictions are derived from laboratory studies. These outputs represent self-reported alertness and score on a standard task, respectively.

Screenshot of CPSS 1.2

Screenshot of CPSS 1.2

CPSS 1.2 is designed for evaluating both experimental and operational schedules. It can also be useful in validating changes to the circadian model, and as an educational tool.

Click here to download the user manual
Click here to download the equation summary
Click here to go to the software download page


Copyright © [2002] The Brigham and Women's Hospital, Inc.
The Brigham and Women's Hospital, Inc. and its agents retain all rights to this software. The software is being made available without warranty of any kind, expressed or implied, including but not limited to implied warranties of merchantability OR fitness for a particular purpose. The Brigham and Women's Hospital, Inc. and its agents shall not be liable for any claims, liabilities, or losses relating to or arising from any use of this software.

Contact Information
For any questions or issues regarding CPSS software, please contact us at

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