Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems

Welcome to CHI 2015, the premier international forum for human-computer interaction (HCI). In its early days, HCI focused on optimizing interactions between a user and a computer. Today, computers pervade our world, impacting our lives in varied and subtle ways. By never focusing solely on technology itself but nalways on innovations and their effects throughout human lives, HCI has increasingly come to mean human-centered innovation. The theme for the conference this year is CROSSINGS which represents our excitement about crossing into Asia and also reflects CHI's core principle of crossing disciplines, crossing people and technology, crossing research and business, crossing physical and digital, crossing you and me. This year's conference brings CHI to Asia for the first time in its 33-year history, continuing the SIGCHI commitment to making CHI a truly international community. The city of Seoul represents one of many innovation centers in Asia and provides a fantastic opportunity to showcase groundbreaking content from across the region. In addition to an exciting technical program, we are holding four special symposia devoted to breakthrough insights and innovations from the Chinese, Japanese and ASEAN research communities. The exciting keynote program features speakers who will bring fresh perspectives to CHI including Dean Lou Yongqi of Tongji University, China, a prominent global thinker on social and sustainable design; Executive VP Donghoon Chang, MFA, head of Samsung Electronic's design strategy; Senior Research Fellow David Min, PhD, head of the Software Center at LG Electronics; and PSY, the media record breaker and innovator discussing creative methods and the impact of social media on to cross cultural boundaries. CHI is honored this year to be the forum chosen by the recipient of one of ACM's top awards, the Athena Lecturer Award, Susan T. Dumais who developed novel algorithms and interfaces for interactive retrieval that have made it easier for people to find, use and make sense of information. She will present insights from her experiences at a special keynote session at the conference. CHI 2015 includes two days of focused workshops and four days of technical content, including CHI's prestigious technical program, with 16 parallel sessions of rigorously reviewed research Papers, engaging Panels, Case Studies and Special Interest Groups (SIGs), an extensive Course program and invited talks from SIGCHI's award winners: Leysia Palen, Jean Scholtz, Michel Beaudouin-Lafon, Jim Hollan, Susan Dray and the new inductees to the CHI Academy. We also host student research, design, and game competitions, and last-minute SIGs for discussing current topics. The popular alt.chi forum entered its tenth year of provocation to the HCI community. Interactivity's hands-on demonstrations showcase the best of interactive technology and innovation. The program also highlights more than 200 Work-In-Progress posters. Evening events include the CHI 2015 conference reception, Sponsors and University events, local performances and the Job Fair. Across all tracks, CHI received over 2800 submissions and accepted nearly 1000 that will appear in the ACM Digital Library.