Chapter 12 Flashcards
What is conceptual model
The developer/designer intend to think on his mind about an object. It is defined as “a description of the proposed system in terms of a set of integrated ideas and concepts about what it should do, behave and look like, that will be understanding by the users in the manner intended.”
What is implementation model
It is system image. It consist of documentation, labels and other physical things.
What is gulf of execution
The difference between mental model and conceptual model
What is gulf of evaluation
Amount of effort a person must exert to interpret the physical state of the system and determine how well the expectations and intentions have been met.
If we easily understand the system and actions then gulf of execution is small otherwise it is large.
True/false
True
If we easily understand the consequences of actions of system then gulf of evaluation is small otherwise it is large.
True/false
True
What are design principles
- Visibility
- Affordance
- Constraints
- Consistency
What is visibility
Make relevant part visible
What is affordance
Its an attribute of an object that gives clues how to use it.
What are 2 types of objects
- Physical
2. Virtual
What are 2 types of affordance
- Real (physical objects e.g. chair)
2. Perceived (virtual objects e.g. button)
Which type of affordance is not obvious and has to be learned
Virtual
What are constraints
Restricting the kind of user interaction that can take place at a given moment of time.
What are different types of constraints
- Physical
- Logical
- Cultural
What are physical constraints
It refer to the way physical objects restricts the movement of things (e.g. door key place in a door)
