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Principles of interface design

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Temuulen Tsenddorj

on 13 January 2015

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Transcript of Principles of interface design

Fundamental Principles of interface design
There are range of specialised HCI's that accessible for users who are visually, orally, aurally or physically challenged
This presentation will you understand the fundamental principles of interface design:

Behavior models
information processing
Behavior models
"Guide when designing interface that predicts how the interface or the user will behave. This is used to determine whether its suitable for the device."

Examples of behavior models:
Predicative models - The keystroke-level model (KLM), The throughput (TP) and Fitt's Law
Descriptive models - The key-action model (KAM), Buxton's three state and Guiard's model

The keystroke-level model

Breaks down operations into low level actions
For example; hitting keys on the key board, moving or clicking the mouse.
Each action is allocated to a time to calculate the how the system will respond

Importance of colour in HCI

Its importance is to ensure that the user will be able to see the colours when using the interface.
This includes - colour charts, backgrounds and text colours
Colours can affect individuals in different ways - e.g. users with medical condition
Information Processing
"How information is processed when using an interface and the speed the process is carried out".

Principles of information processing:
Humans as a component
Human information processing (HIP)
Goals, operators, method and selectons (GOMS)
Humans as a component

In HCI the user is the main component that is required to carry out operations
The HCI design should consider taking account of human interaction variables such as expectation, requirements and disability
Haptic Technology

Enables severely physically challenged users to interact with the device using their sense of touch.


Allows a user with dyslexia to able to hear the text instead of reading it

Voice recognition

Aurally challenged users can use speech recognition to record a conversation or meeting and convert into text.
Perception of HCI

"Perception is what allows the brain to see and feel when using a HCI."

Types of perception in HCI:


This is when you can see colour above another layer or colour

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