1/11/2024 0 Comments Jef raskin user interface"An human-machine interface is modal with respect to a given gesture ![]() In his book The Humane Interface, Jef Raskin defines modality as follows: ![]() Modeless interfaces avoid mode errors, in which the user performs an action appropriate to one mode while in another mode, by making it impossible for the user to commit them. ![]() Modal interface components include the Caps lock and Insert keys on the standard computer keyboard, both of which typically put the user's typing into a different mode after being pressed, then return it to the regular mode after being re-pressed.Īn interface that uses no modes is known as a modeless interface. In user interface design, a mode is a distinct setting within a computer program or any physical machine interface, in which the same user input will produce perceived results different from those that it would in other settings. Second Law: A computer shall not waste your time or require you to do more work than is strictly necessary.Īdditionally he mentions that "users should set the pace of an interaction", meaning that a user should not be kept waiting unnecessarily and that an interface should be monotonous with no surprises "the principle of monotony".Not to be confused with Multimodal interaction or Modality (human-computer interaction).First Law: A computer shall not harm your work or, through inactivity, allow your work to come to harm.The reuse principle: The design should reuse internal and external components and behaviors, maintaining consistency with purpose rather than merely arbitrary consistency, thus reducing the need for users to rethink and remember.Īccording to Jef Raskin there are two laws of user interface design:.The tolerance principle: The design should be flexible and tolerant, reducing the cost of mistakes and misuse by allowing undoing and redoing, while also preventing errors wherever possible by tolerating varied inputs and sequences and by interpreting all reasonable actions reasonable.The feedback principle: The design should keep users informed of actions or interpretations, changes of state or condition, and errors or exceptions that are relevant and of interest to the user through clear, concise, and unambiguous language familiar to users.Good designs don't overwhelm users with alternatives or confuse with unneeded information. The visibility principle: The design should make all needed options and materials for a given task visible without distracting the user with extraneous or redundant information.The simplicity principle: The design should make simple, common tasks easy, communicating clearly and simply in the user's own language, and providing good shortcuts that are meaningfully related to longer procedures.The structure principle is concerned with overall user interface architecture. The structure principle: Design should organize the user interface purposefully, in meaningful and useful ways based on clear, consistent models that are apparent and recognizable to users, putting related things together and separating unrelated things, differentiating dissimilar things and making similar things resemble one another.According to Lucy Lockwood's approach of usage-centered design, these principles are: The principles of user interface design are intended to improve the quality of user interface design. ![]() JSTOR ( February 2022) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: "Principles of user interface design" – news Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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