![]() ![]() Every extra unit of information in a dialogue competes with the relevant units of information and diminishes their relative visibility.ĩ. Allow users to tailor frequent actions.ĭialogues should not contain information which is irrelevant or rarely needed. Instructions for use of the system should be visible or easily retrievable whenever appropriate.Īccelerators-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. The user should not have to remember information from one part of the dialogue to another. Minimize the user's memory load by making objects, actions, and options visible. Either eliminate error-prone conditions or check for them and present users with a confirmation option before they commit to the action. Follow platform conventions.Įven better than good error messages is a careful design which prevents a problem from occurring in the first place. Users should not have to wonder whether different words, situations, or actions mean the same thing. 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. Follow real-world conventions, making information appear in a natural and logical order. The system should speak the user's language, with words, phrases and concepts familiar to the user, rather than system-oriented terms. The system should always keep users informed about what is going on, through appropriate feedback within reasonable time.Ģ.
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