Mok’s Principles for Metaphors (cont.)
Feedback Does the program interface provide immediate and clear feedback or results in response to a user's input?
Modes of operation Does the program interface facilitate the three main modes of interaction with the program: (1) commanding or telling the program to do something, such as look up a word; (2) manipulating an object or element being displayed or otherwise presented, such as rotating an object on the screen to view it from other perspectives; and (3) recording or inputting information or data, such as adding a new entry to a bibliography?
Theoretical Foundations of Multimedia Chapter 7