October 18, 2020

10 usability heuristics for user interface design.

Hello, welcome to my blog section about INFM372.

This week is about the 10 usability heuristics and when to expect or use them. The 10 usability heuristics are considered as the general principles for interactive design and should be referred to as broad rules of thumb and not specific usability guidelines. After watching the videos provided by the class modules, I did some search and find out the following rules that explained in deep what the Heuristics are about:

  1. Visibility of system status

    The system should always keep users informed about what is going on, through appropriate feedback within reasonable time.

  2. Match between system and the real world

    The system should speak the users' language, with words, phrases and concepts familiar to the user, rather than system-oriented terms. Follow real-world conventions, making information appear in a natural and logical order.

  3. User control and freedom

    Users often choose system functions by mistake and will need a clearly marked "emergency exit" to leave the unwanted state without having to go through an extended dialogue. Support undo and redo.

  4. Consistency and standards

    Users should not have to wonder whether different words, situations, or actions mean the same thing. Follow platform conventions.

  5. Error prevention

    Even better than good error messages is a careful design which prevents a problem from occurring in the first place. Either eliminate error-prone conditions or check for them and present users with a confirmation option before they commit to the action.

  6. Recognition rather than recall

    Minimize the user's memory load by making objects, actions, and options visible. The user should not have to remember information from one part of the dialogue to another. Instructions for use of the system should be visible or easily retrievable whenever appropriate.

  7. Flexibility and efficiency of use

    Accelerators — unseen by the novice user — may often speed up the interaction for the expert user such that the system can cater to both inexperienced and experienced users. Allow users to tailor frequent actions.

  8. Aesthetic and minimalist design

    Dialogues should not contain information which is irrelevant or rarely needed. Every extra unit of information in a dialogue competes with the relevant units of information and diminishes their relative visibility.

  9. Help users recognize, diagnose, and recover from errors

    Error messages should be expressed in plain language (no codes), precisely indicate the problem, and constructively suggest a solution.

  10. Help and documentation

    Even though it is better if the system can be used without documentation, it may be necessary to provide help and documentation. Any such information should be easy to search, focused on the user's task, list concrete steps to be carried out, and not be too large.

credit from Jacob Nielson

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