An Introduction to the IP/PCT Model Implementation in IPME


  1. Hendy, K.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN)
This document provides a description of the Information Processing (IP)/Perceptual Control Theory (PCT) model implemented in the Integrated Performance Modelling Environment software by Micro Analysis and Design (IPME). The current document is an edited and reduced version of an earlier report. In the current document, an attempt has been made to improve readability through a reorganisation of the material and the elimination of content that is not central to understanding the function of the IP/PCT model within IPME. The essence of the IP model is that all factors that impact on human cognitive workload can be reduced to their effects on the amount of information to be processed and the amount of time available before the decision has to be actioned. From this position, it can be shown that if humans are limited at the rate at which they process information then operator workload, performance, and error production are all functions of the time pressure. The IP Model is about time and the information to be processed. The PCT Model argues that humans behave as multi-layered closed loop control systems. The set points for these control loops are our perceptual goals (or how we want to see, hear, feel, taste, or smell the state of the world). According to PCT, we sense the world state, forming a perception of that state which we then compare with our goal. If there is a difference between our perceived and desired states, we formulate an action. This action is implemented in ord

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operator workload;human modelling;IPME;IP/PCT model
Report Number
DRDC-TORONTO-TR-2010-040 — Technical Report
Date of publication
01 Mar 2011
Number of Pages
Electronic Document(PDF)

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