Usability Testing Dataset: SUS and CTA Evaluation on Legoas Smart Digital Auction Application

This dataset contains the results of usability testing conducted on the Legoas Smart Digital Auction mobile application. Two evaluation methods were applied: (1) the System Usability Scale (SUS) collected from 100 respondents using a 10-statement Likert scale questionnaire, and (2) the Concurrent Think Aloud (CTA) evaluation involving 2 users performing 30 scenario-based tasks while verbalizing their experience.The SUS dataset records user responses and final scores reflecting perceived usability, while the CTA dataset includes qualitative verbal responses categorized into five usability aspects: Learnability, Efficiency, Satisfaction, Memorability, and Errors.This open dataset is provided to support further research in usability testing, UX improvement, user-centered design, and digital auction platform development.