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5.6 Executive Process-Interactive Control (EPIC) Model
EPIC model is a cognitive design for modeling human, multimodal, and multiple-
task performance. This model is useful to examine the system or interface speed of
processing, working memory capacity, dual-task performance, and other cognitive
abilities change by age. This model was developed by Kieras and Meyers for
modeling human cognition and performance (Kieras and Meyer
1997
; Meyer et al.
2001
). EPIC model contains peripheral sensory-motor processors surrounding a
production rule cognitive processor and is used to construct pr
cise computational
é
models for a variety of human
computer inaction situations.
EPIC model has several elements, namely (Kidder et al.
1999
) modal stores,
control store, tag store, and storage capacity.
-
The modal stores contain visual, auditory, and tactile stores that contain coded
information from modality-speci
c perceptual processors.
Control store contains the following:
goals (assist to perform particular tasks);
-
steps (assist users to complete their job in a sequence manner);
-
strategy notes (to enable or disable rules for alternative task strategies);
-
status notes (indicate the current state of various processes).
-
Tag store includes labels that assign speci
c roles to modal-store items.
Storage capacity is focused on task storage and there is no limit of stored items.
Finally, this model is very useful to assess human performance limitations
toward the interface/software design from low levels of speci
c interaction tech-
niques and at high levels of systems that support complex task performance in
multimodal time-stressed domains (Kieras and Meyer
1997
, p. 394) (Fig.
5.3
).
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