This document discusses modeling driver behavior using a cognitive architecture. It describes how ACT-R can be used to model things like visual attention, production rules, and the interplay between perception and motor control that underlie driving. The document also notes future areas of research like modeling tasks in more realistic environments, improving the fidelity of target modeling, and integrating learning and memory models.

1. User Modeling in a
Cognitive Architecture
(Driving in the HUD)
DongNyeok Jeong

2. Computational Cognitive
Modeling
• Human behavior behind the human
mind
• Artificial intelligence - Turing Test
• Computer - Brain
• Brain - Mind
• Computer - Mind ?

3. An Integrated Theory of
the Mind
• Integrated !
• ACT-R
• perceptual-motor modules, goal module,
declarative memory module (An Integrated
Theory of the Mind, John R. Anderson et al.,
2004)
• Architecture, Representation, Ontology,
Knowledge type, Inference type

4. Cognitive Architecture
• A general framework for specifying
computational behavioral models of
human cognitive performance
• Abilities and motorstorage, recall, learning,
perception,
: memory
action
• Constraints : memory decay,and limited motor
peripheral perception encoding,
foveal versus
performance

5. Driver using a HUD
• Understanding and processing meaning of
icons
• Skip motor process
ex) handling, gearing, foot down, eye-
movement ..
• Multi-processing in cognition
• HUD attention in driving situation

6. Flowchart in ACT-R
Find-Shift-Harvest Paradigm

7. Production Rules in ACT-R
• Keep on eye on front widow • HUD direction Changed
• Distinguish HUD direction

8. Targets in Visual Process
• Level 1,2 • Level 3
• Visicon

9. Driver Modeling
• Modeling Driver Behavior in a Cognitive
Architecture (Dario D. Salvucci, Drexel University,
Philadelphia, Pennsylvania, 2006)
• Steering profiles, lateral position profiles, gaze
distributions
• lane keeping, curve negotiation, lane changing
• ETA framework (Byrne, 2001; Gray, 2000; Gray &
Boehm-Davis, 2000)
• Control, monitoring, decision making component

10. Driver Modeling

11. Visual Attention
• ACT-R’S EMMA (Eye Movements and
Movement of Attention) module (An
integrated model of eye movements and
visual encoding, Salvucci, 2001)
• Based on Top-down process

12. Future ...
• 나 동일한 모델링을 하는가
제한된 환경에서 주어진 실험과 얼마
• 실험 환경을 얼만큼 실제 환경과
유사하게 모델링 하는가
• 타겟 모델링의 세밀함
• ACT-R’s EMMA source code

13. Future ... (cont.)
• 실제 코딩 능력보다 중요한 것은 인간
두뇌 프로세스를 이해하는 것
• 학습과 기억, 관련된 인지 모델링
• The activation equation
• ACT-R 6.0 ~ integrated perceptual and
Motor Modules (EPIC)