Explore the development and validation of the Pictorial System Usability Scale (P-SUS) in this 21-minute conference talk from the ACM CHI Conference on Human Factors in Computing Systems. Learn about the user-centered design process used to create a pictorial multi-item scale for measuring perceived usability of mobile devices, based on the established verbal System Usability Scale (SUS). Discover the results of the first validation study, including psychometric properties and user motivation, and gain insights into this innovative approach to usability evaluation for mobile devices.