UMUX, SUS, and SUPR-Q are all widely used usability metrics that measure user satisfaction and usability of a product. While they share some similarities, they differ in their approach to measuring user experience and the specific usability aspects they focus on.
UMUX is a usability metric that focuses on a product's overall usability and user satisfaction. It is based on a short survey of four questions that measure ease of use, usefulness, happiness, and likelihood of a recommendation. The UMUX score is calculated by averaging the responses to these questions on a scale of 0-100, with a higher score indicating a better user experience.
SUS (System Usability Scale) is another widely used usability metric that measures the perceived usability of a product. It consists of a 10-item questionnaire that measures aspects such as ease of use, learnability, and efficiency. Each item is rated on a 5-point Likert scale, and the SUS score is calculated by multiplying the average score by 2.5, resulting in a score range of 0-100. A higher SUS score indicates better usability.
SUPR-Q (Standardized User Experience Percentile Rank Questionnaire) is a more comprehensive usability metric that measures the user experience of a product across multiple dimensions, including usability, trust, loyalty, and appearance. It consists of a 8-item questionnaire that is rated on a 5-point Likert scale, with a score range of 0-100. The SUPR-Q score is calculated by averaging the responses to these questions.
While UMUX, SUS, and SUPR-Q are all usability metrics, they differ in their focus and approach. UMUX is a simple and quick metric that provides a broad measure of overall usability and user satisfaction, making it ideal for measuring user experience in a wide range of products and industries. SUS is a more detailed metric that focuses on specific aspects of usability and is often used to compare the usability of different products or designs. SUPR-Q is a comprehensive metric that measures user experience across multiple dimensions, providing a more holistic view of the user experience.
In terms of how these metrics relate to each other, there is some correlation between UMUX, SUS, and SUPR-Q scores, as they all measure aspects of user satisfaction and usability. However, it's important to note that they are not interchangeable, and the specific scores can vary depending on the product and user population being measured. Additionally, the interpretation of scores may differ depending on the particular context and industry.
Overall, while UMUX, SUS, and SUPR-Q are all usability metrics that measure user experience, they differ in their approach and focus. Each metric has its strengths and limitations, and the choice of which metric to use will depend on the specific goals and needs of the project.