Model Human Processor and Time Scales

What is the model human processor?

describes human performance as it relates to human-computer interaction

model user of a computer:

• eyes + ears for input - perceptual subsystem

• arm-hand-finger for output - motor subsystem

• brain - processors and memories - cognitive subsystem

What is the Perceptual System?

perceptual memory and processor

transforms external events into a form that the cognitive system can process

What is perceptual memory?

a buffer for sensor data

incoming stimuli are stored for a short time

What is the perceptual processor?

the interface between the external world and the cognitive system

responsible for receiving and interpreting sensory information (stimuli)

What is perceptual processor order of coding influenced by?

our attention

What is the cognitive system?

working memory, long-term memory and the cognitive processor

processes perceived information and decides how to act on it

What is the cognitive processor?

works on symbolic information that is available in working memory, as a result of perceptual coding

What is the cognitive processor based on?

recognise-act cycle

recognise - activate associations stored in long-term memory

act - decide what to do next, modifying work memory