What is the reliability level of SUS?

[jakariabd@]

The SUS usability scale was created as a "quick and dirty" scale to be administered after usability testing.
How to interpret the SUS result?
The best way to interpret your score is to convert it to a percentile rank by normalizing it. I created a calculator and guide that takes raw SUS scores and generates percentile ranks and letter grades (A+ to F) for eight different types of applications.
The SUS has been shown to be more reliable and detect differences with smaller sample sizes than domestic and other commercially available questionnaires.
What is considered a good result in the SUS system?
The average SUS score across all 500 studies is 68. A france whatsapp number data SUS score above 68 will be considered above average, and a score below 68 will be considered below average.
What questions are used in usability surveys?
Screen: Ask basic questions about user demographics and experience.
Pre-test: Ask psychographic questions based on your user personas.
Test: Ask questions about why users take certain actions and make decisions on your site.
How is SUS measured?
For each of the odd-numbered questions, subtract 1 from the score.
For each of the even-numbered questions, subtract their value from 5.
Take these new values ​​you found and add up the total score.
Then multiply that by 2.5.
How is Umux Lite calculated?