The aim of this workshop is to introduce the combination of different disciplines to build adaptive systems and to discuss the approach and state of the art advances in research and development of the construction of user-centered adaptive systems. UCDAS is targeted to researchers from different disciplines in academia and industry, as well as practitioners who share interests in adaptive systems design and development. The focus will be on the processes and methodologies combining techniques from these disciplines and the experiences drawn from adaptive system design practice, as well as on emergent topics. A user-adaptive system changes to improve its performance by adjusting its operation to the feedback from users. A user-adaptive system infers the goals and needs of users from multiple sources of information in terms of activity and interests. Research on user-adaptive systems should be addressed to identify new means for enriching the user experience through advances in automated reasoning, adaption and user interface design. User models are particularly important. To build adaptive systems, a combination of different disciplines is required, such as usability engineering, human-computer interaction, software engineering, system engineering, psychology, and sociology, each one providing its principles and techniques.