Nowadays, I’m trying to broaden my knowledge on usability testing, and I just came across with the guy named Jakob Nielsen. If you are not familiar with him, he is a well-known usability consultant who is highly practical matters concerned user experience. I guess I have a long way to go on this subject, but it is always better to be on the road instead of just sitting and thinking about the journey.

There are a lot of sources on Nielsen’s principles for user interface design, but I want to mention them here briefly. Here they are;

• Visibility of system status
• Match between system and the real world
• User control and freedom
• Consistency and standards
• Error prevention
• Recognition rather than recall
• Flexibility and efficiency of use
• Aesthetic and minimalist design
• Help users recognize, diagnose, and recover from errors
• Help and documentation

Here is a good source which explains these principles with examples and here is Nielsen’s one of the latest speech at UX Conference 2017.