Design Principles for Usability

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Questions and Answers

What is the ability of a user to take corrective action once an error has been recognized called?

Customizability

Substitutivity

Recoverability (correct)

Responsiveness

What is the principle of flexibility that allows equivalent values of input and output to be substituted for each other?

Task migratability

Multimodality

Customizability

Substitutivity (correct)

What is the ability of a user to evaluate the internal state of the system from its perceivable representation?

Task conformance

Recoverability

Observability (correct)

Responsiveness

What is the modifiability of the user interface by the user or system called?

Customizability Signup and view all the answers

What is the degree to which system services support all of the user's tasks?

Task conformance Signup and view all the answers

What is the principle of flexibility that allows passing responsibility for task execution between the user and system?

Interleaving Signup and view all the answers

What is the ability of a system to perceive the rate of communication with the user?

Responsiveness Signup and view all the answers

What is the ability of a system to allow equivalent values of input and output to be substituted for each other called?

Substitutivity Signup and view all the answers

What is the primary goal of supporting learnability in system design?

To enable users to learn the system quickly and achieve maximum performance Signup and view all the answers

What does predictability refer to in the context of system design?

The ability of the user to determine the effect of future actions based on past interaction history Signup and view all the answers

What is the primary goal of supporting flexibility in system design?

To enable users to interact with the system in multiple ways Signup and view all the answers

What is the primary role of synthesizability in system design?

To enable users to assess the effect of past actions Signup and view all the answers

What does familiarity refer to in the context of system design?

The ability of the user to apply prior knowledge to a new system Signup and view all the answers

What is the primary role of dialogue initiative in system design?

To enable users to interact with the system without being constrained by the system Signup and view all the answers

What is the primary role of multithreading in system design?

To enable users to interact with the system for more than one task at a time Signup and view all the answers

What is the primary role of generalizability in system design?

To enable users to extend specific interaction knowledge to new situations Signup and view all the answers

Study Notes

Principles to Support Usability

Learnability is the ability of a new user to learn the system quickly and achieve maximum performance.
Flexibility refers to the multiplicity of ways users and systems exchange information.
Robustness is the level of support provided to users in achieving and assessing goal-directed behavior.

Elements of Learnability

Predictability allows users to determine the effects of future actions based on past interaction history.
Synthesizability enables users to assess the effects of past actions and receive immediate or eventual feedback.
Familiarity is how prior knowledge applies to a new system.
Affordance is the ability to guess how to use a system.
Generalizability is the ability to extend specific interaction knowledge to new situations.
Consistency is the likeness in input/output behavior arising from similar situations or task objectives.

Elements of Flexibility

Dialogue initiative is the freedom from system-imposed constraints on input dialogue.
Multithreading is the ability of a system to support user interaction for more than one task at a time.
Task migratability is passing responsibility for task execution between the user and system.
Substitutivity allows equivalent values of input and output to be substituted for each other.
Customizability is the modifiability of the user interface by the user or system.

Elements of Robustness

Observability is the ability of users to evaluate the internal state of the system from its perceivable representation.
Recoverability is the ability of users to take corrective action once an error has been recognized.
Responsiveness is how users perceive the rate of communication with the system.
Task conformance is the degree to which system services support all of the user's tasks.

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Description

This quiz covers the principles of design that support usability, including learnability, flexibility, and robustness. Test your knowledge of design guidelines and standards that enable effective user interaction.