Describe the user interface designers tool known as the ‘Model Human Processor'

describe the user interface designers tool known as the ‘Model Human Processor',

• describe the user interface designers tool known as the ‘Model Human Processor',

• describe how the model will be applied to a user interface

a (theoretical) user interface design tool,

• a (theoretical) user interface design tool,

• developed by Card, Moran and Newell in 1983

• based on cognitive processing:

• ‘thinking & remembering’
• if we knew how we remembered things, then we should be able to produce an interface which the user would be able to remember

• “if it works like you think it should then ….”

quantify the cognitive process that users go through between perception and action:

• quantify the cognitive process that users go through between perception and action:

• what happens between the user seeing/hearing and doing?

• link how a human remembers and how a (computer) system should operate:

• “the last time I saw/heard that it meant ..... and I needed to …..”

Consists of three interacting systems:

• Consists of three interacting systems:

• perceptual processor

• visual/audio storage
• seeing & hearing

• cognitive processor

• working memory
• identify link to mental models & past experience

• motor processor

• carry out actions

• See it ….. work out what to do ….. do it!

perceptual processor = inputs

• perceptual processor = inputs

• working memory = RAM

• long-term memory = secondary storage (HDD …)

• cognitive processor = CPU

• motor processor = outputs

theory based on human information processing

• theory based on human information processing

• describes the cognitive process that people go through between perception & action

• seeing/hearing  doing

draws an analogy between the processing and storage of a computer with

• draws an analogy between the processing and storage of a computer with

draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• see/hear

draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• see/hear  recognise event

draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• see/hear  recognise event  determine response

draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• see/hear  recognise event  determine response  physically respond

draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• see/hear  recognise event  determine response  physically respond

• a visual or audible stimulus is seen (or heard)

draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• see/hear  recognise event  determine response  physically respond

• a visual or audible stimulus is seen (or heard)

• attention drawn to a dialogue box on screen (beep)

draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• see/hear  recognise event  determine response  physically respond

• a visual or audible stimulus is seen (or heard)

• attention drawn to a dialogue box on screen (beep)

• the physical attributes of the stimulus are decoded

draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• see/hear  recognise event  determine response  physically respond

• a visual or audible stimulus is seen (or heard)

• attention drawn to a dialogue box on screen (beep)

• the physical attributes of the stimulus are decoded

• human interprets the response needed

draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• see/hear  recognise event  determine response  physically respond

• a visual or audible stimulus is seen (or heard)

• attention drawn to a dialogue box on screen (beep)

• the physical attributes of the stimulus are decoded

• human interprets the response needed (what should I do?)

• a motor response is initiated

draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• draws an analogy between the processing and storage of a computer with the perceptual, cognitive, motor and memory activities of a human

• see/hear  recognise event  determine response  physically respond

• a visual or audible stimulus is seen (or heard)

• attention drawn to a dialogue box on screen (beep)

• the physical attributes of the stimulus are decoded

• human interprets the response needed (what should I do?)

• a motor response is initiated

• clicks a button with mouse ….

• a flashing cursor will indicate where the user is to enter data

• a beep may sound when a mistake is made

• a logical order to the inputs will be employed