Basic principles of UX?

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  1.  Discoverability - If user can't find it, it does not exist.
  2. Signifiers           - Calling for action (Click me, edit profile picture, button, arrow etc) showing  possible actions
  3.  Feedback          - Showing that button is clicked, page is loading... giving user feedback that it is working
  4.  Conceptual models and mental models - top Navigation bar, sitemap at bottom
  5.  Mappings  - How knobs, thermometers work
  6.  Constraints
  7. Consistency, standards, Heuristics
  8. Pattern and Learnability
  9. Visual Hierarchy and emphasis - size, proximity, color, opacity, and actual tonal contrast between elements
  10.  Fitts law - The time to acquire a target is a function of the distance to and size of the target.
  11.  Gutenberg Diagram, Z- and F-Pattern Layouts
  12. Recognition Rather than Recall
  13. Aesthetic and Minimalist Design
  14. Error Prevention

 

https://www.toptal.com/designers/interactive/interaction-design-principles 

 


Large buttons are easy to target. Taking advantage of Fitts' Law, one can also introduce constraints to prevent errors: note the far left placement of the "Cancel" button.

 


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