Lecture 3 - HCI Flashcards
What does HCI focus on in the ACP model in terms of environment
Environment:
* Product
* Website
* Tools
What does HCI focus on in the ACP model in terms of Cognition
- Memory
- Attention
- Flexibility
- Inhibition
- Motivation
- Enjoyment
What does HCI focus on in the ACP model in terms of Goals
- Productivity
- Performance
- Happiness
- Safety
What does HCI focus on in the ACP model in terms of indicators
- Speed
- Accuracy
- Sales
- Production
- Errors
What are the levels of HCI
- Utility: It is useful to me, it meets my needs
- Usability: I am able to use the product easily
- Desirability: I like the way the product looks and feels
- Brand Experience: My overall feeling about the brand/product is good
What are displays?
Displays: human-made artifacts designed to
support the perception of relevant system
variables and facilitate the further processing of
that information
What are GUIs (Graphical User Interface)
GUIs: graphics, controls and responses used to
manipulate the display
- Microsoft Windows
- Apple iOS
- Linux
Design principles of HCI
- Physical properties: controls, layout, environment
- Task: processes, monitoring, positioning
- Human user: strengths, weaknesses
Perceptual properties of design
- Legibility: can you read it
- Absolute judgement: Geel is een andere kleur dan paars
- Top down expectation
- Redundancy gain: easy, faster, more accurate
- Discriminability: 1 euro is minder dan 2 euro
Mental model of design
- Pictorial realism
- Moving part
What is pictorial realism?
You can ‘see’ the proces (e.g. sound bars on DJ table)
What is a moving part
You can move the ‘stuurknuppel’
What are the design principles of attention?
- Information access
- Proximity compatibility: A, B en C zijn dicht bij elkaar net als Q, R en S
- Multiple resources
What are the design principles of memory?
- Knowledge in world: you know which button to click to give a command
- Predictions: buienradar
- Consistency
What is an example of the design principle of conflict?
That each button is different and does not interfere with the functionality of other buttons
What are the design principles of alerts?
- Warnings
- Cautions
- Advisories
What are the design principles of labels, icons?
- Visibility
- Discriminability
- Meaningfulness
- Location
Usability
The extent to which a product can be used by
specified users to achieve specified goals with
effectiveness, efficiency and satisfaction in a specified
context of use.
What are usability goals?
Effectiveness
Efficiency
Safety
Utility
Learnability
Memorability
Example of UG Effectiveness
Accuracy and completeness with which users achieve specified tasks
Example of UG Efficiency
Resources expended in relation to the accuracy and
completeness with which users achieve goals
Example of UG Safety
Avoid danger of carrying out unwanted actions
accidently; means of recovery when they happen
Example of UG Utility
Right functionality
Example of UG Learnability
Easy to learn, easy to master
Example of UG Memorability
Retention over time
What are the three factors of system development
- Understanding
- Design
- Evaluation –> understanding –> design –> evaluation
What are the 7 stages of action
- Goals
- Intentions
- Action specification
- Interface mechanism
- Interface display
- Interpretation
- Evaluation
There is an evaluation bridge between step 5 interface display and step 7 evaluation
Metaphores
A mental model
What are HCI guidelines
- Match real world
- Consistency and standards
Visibility of system status - User control and freedom
- Error prevention, recovery
- Memory
- Flexibility, efficiency
- Simplicity and aesthetics
