Summary: Putting It All Together - Foundations for Designing User-Centered Systems - page 385

Fig. 14.2 A diagram of the model human processor (adapted from Card et al. 1983 ). d indicates a
half-life decay rate; l is a capacity; j is the modality of the storage; s is the time to do something
14.3.2.4 Explicit Information Processing Models: ACT-R
There is now a range of cognitive architectures that take as input a descriptive task
analysis that looks a lot like a computer program, and then simulate the cognitive
aspects of task performance, often with limitations simulated from vision and
motor performance. One of the most widely used architectures is ACT-R; others
include EPIC (Kieras et al. 1997 ) and Soar (Laird 2012 ; Ritter 2003 ; Ritter and
Bibby 2008 ).