Accession Number:

ADA492850

Title:

Model and Study of Threatening Tasks and Fatigue

Descriptive Note:

Final rept. Oct 2005-Sep 2008

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK

Personal Author(s):

Report Date:

2008-01-20

Pagination or Media Count:

25.0

Abstract:

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.

Subject Categories:

  • Psychology
  • Stress Physiology
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE