Model and Study of Threatening Tasks and Fatigue
Final rept. Oct 2005-Sep 2008
PENNSYLVANIA STATE UNIV UNIVERSITY PARK
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This was a follow-on project to Designing, building, and testing behavioral moderators with the ACT-R cognitive architecture. This project a prepared a protocol for studying how cognition is affected by a stressor task appraisal and a mitigator caffeine, including software for gathering data on working memory, processing speed, and visual signal detection, and a protocol for serial repeated subtraction SS. b We ran 45 Ss using SS and 45 with a simple ATC-like task as the stressor. c We have analyzed the data on how performance and physiology are affected by stress. We found that stress influenced performance probably through working memory changes and new details of physiology stress. d We created cognitive models in ACT-R. e We compared the SS models performance by hand and by using a GA running on a supercomputer. We found that ACT-R is a model of individuals, not groups, multiple parameter sets provided excellent fits even to individuals, and GAs are an excellent way to choose architectural parameters. f Opportunistically, we finished a learning model, a book on learning, and a keystroke logger for studies.
- Stress Physiology
- Computer Programming and Software