This is the second volume of the two-volume set (CCIS 617 and CCIS 618) that contains extended abstracts of the posters presented during the 18th International Conference on Human-Computer Interaction, HCII 2016, held in Toronto, Canada, in July 2016. The total of 1287 papers and 186 posters presented at the HCII 2016 conferences was carefully reviewed and selected from 4354 submissions. These papers address the latest research and development efforts and highlight the human aspects of design and use of computing systems. The papers thoroughly cover the entire field of Human-Computer Interaction, addressing major advances in knowledge and effective use of computers in a variety of application areas. The papers included in this volume are organized in the following topical sections: web, social media and communities; gesture and motion-based interaction; expressions and emotions recognition and psychophysiological monitoring; technologies for learning and creativity; health applications; location-based and navigation applications; smart environments and the Internet of Things; design and evaluation case studies.

This is the second of a two-volume set (CCIS 434 and CCIS 435) that constitutes the extended abstracts of the posters presented during the 16th International Conference on Human-Computer Interaction, HCII 2014, held in Heraklion, Crete, Greece in June 2014 and consisting of 14 thematic conferences. The total of 1476 papers and 220 posters presented at the HCII 2014 conferences were carefully reviewed and selected from 4766 submissions. These papers address the latest research and development efforts and highlight the human aspects of design and use of computing systems. The papers accepted for presentation thoroughly cover the entire field of Human-Computer Interaction, addressing major advances in knowledge and effective use of computers in a variety of application areas. The extended abstracts were carefully reviewed and selected for inclusion in this two-volume set. This volume contains posters’ extended abstracts addressing the following major topics: social media and social networks; learning and education; design for all; accessibility and assistive environments; design for aging; games and exergames; health and well-being; ergonomics and safety; HCI in business, tourism and transport; human-human and human-agent communication; user experience case studies.

This two-volume set CCIS 173 and CCIS 174 constitutes the extended abstracts of the posters presented during the 14th International Conference on Human-Computer Interaction, HCII 2011, held in Orlando, FL, USA in July 2011, jointly with 12 other thematically similar conferences. A total of 4039 contributions was submitted to HCII 2011, of which 232 poster papers were carefully reviewed and selected for presentation as extended abstracts in the two volumes.

The two-volume set CCIS 713 and CCIS 714 contains the extended abstracts of the posters presented during the 19th International Conference on Human-Computer Interaction, HCI International 2017, held in Vancouver, BC, Canada, in July 2017. HCII 2017 received a total of 4340 submissions, of which 1228 papers were accepted for publication after a careful reviewing process. The 177 papers presented in these two volumes were organized in topical sections as follows: Part I: Design and evaluation methods, tools and practices; novel interaction techniques and devices; psychophisiological measuring and monitoring; perception, cognition and emotion in HCI; data analysis and data mining in social media and communication; ergonomics and models in work and training support. Part II: Interaction in virtual and augmented reality; learning, games and gamification; health, well-being and comfort; smart environments; mobile interaction; visual design and visualization; social issues and security in HCI.

The three-volume set CCIS 850, CCIS 851, and CCIS 852 contains the extended abstracts of the posters presented during the 20th International Conference on Human-Computer Interaction, HCI 2018, which took place in Las Vegas, Nevada, in July 2018. The total of 1171 papers and 160 posters included in the 30 HCII 2018 proceedings volumes was carefully reviewed and selected from 4346 submissions. The 207 papers presented in these three volumes are organized in topical sections as follows: Part I: interaction and information; images and visualizations; design, usability and user experience; psychological, cognitive and neurocognitive issues in HCI; social media and analytics. Part II: design for all, assistive and rehabilitation technologies; aging and HCI; virtual and augmented reality; emotions, anxiety, stress and well-being. Part III: learning and interaction; interacting with cultural heritage; HCI in commerce and business; interacting and driving; smart cities and smart environments.

This is the second volume of the two-volume set (CCIS 528 and CCIS 529) that contains extended abstracts of the posters presented during the 17th International Conference on Human-Computer Interaction, HCII 2015, held in Heraklion, Crete, Greece in August 2015. The total of 1462 papers and 246 posters presented at the HCII 2015 conferences was carefully reviewed and selected from 4843 submissions. These papers address the latest research and development efforts and highlight the human aspects of design and use of computing systems. The papers thoroughly cover the entire field of human-computer interaction, addressing major advances in knowledge and effective use of computers in a variety of application areas. The papers included in this volume are organized in the following topical sections: mobile interaction and smart devices; social media; HCI in business and innovation; learning technologies; HCI in health; assistive technologies and environments; fitness and well-being applications; location and context awareness; urban interaction; automotive and aviation; design and user studies.

This is the second of a two-volume set (CCIS 373 and CCIS 374) that constitutes the extended abstracts of the posters presented during the 15th International Conference on Human-Computer Interaction, HCII 2013, held in Las Vegas, USA, in July 2013, jointly with 12 other thematically similar conferences. The total of 1666 papers and 303 posters presented at the HCII 2013 conferences was carefully reviewed and selected from 5210 submissions. These papers address the latest research and development efforts and highlight the human aspects of design and use of computing systems. The papers accepted for presentation thoroughly cover the entire field of human-computer interaction, addressing major advances in knowledge and effective use of computers in a variety of application areas. The extended abstracts were carefully reviewed and selected for inclusion in this two-volume set. The papers included in this volume are organized in the following topical sections: learning and education; health and medicine; media, art and culture; transport; Web and social media; information search and retrieval; work, collaboration and creativity; text and storytelling; agents, avatars and robots; smart environments; virtual and mixed environments; security and privacy.