Question

What are the five fundamental psychological concepts in design?

The five fundamental psychological concepts in design are: 1) Affordances, which are the possible actions a user can take; 2) Signifiers, which guide the user towards these actions; 3) Constraints, which limit the actions that can be taken; 4) Mappings, which relate actions to their effects; and 5) Feedback, which informs the user about the result of an action.

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Two of the most important features of good design are discoverability and understanding. Discoverability: Is it possible to figure out what actions are possible and how to perform them? Understanding: What does it all mean? How is the product supposed to be used? What do all the different controls and settings mean? Discoverability comprises five fundamental psychological concepts: 1) Affordances (a chair affords support, so in turn it affords the ability to sit); 2) Signifiers (a flat panel on a door signifies one should push); 3) Constraints (imposed limitations on design that can come in four types: physical; cultural; semantic; and logical); 4) Mappings (ordered switches on the wall might specify which switch is for which light); 5) Feedback (the communicating of an action). "Today, I realize that design presents a fascinating interplay of technology and psychology, that the designers must understand both. Engineers still tend to believe in logic. … 'Why are people having problems...

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