Sergio Sayago is an Associate Professor of Human-Computer Interaction in Computer Science at the Universitat de Lleida (Spain). He is passionate about exploring the human side of digital technologies. His interdisciplinary research has spanned web accessibility, usability, and e-learning, with a strong focus since 2010 on older-adult HCI. Before joining UdL, Sergio held postdoctoral positions at the University of Dundee (Scotland, 2010–2012) under a Beatriu de Pinós fellowship and at Universidad Carlos III de Madrid (Spain, 2012–2014) with an Alliance 4 Universities fellowship. He later served as a visiting lecturer and researcher at the University of Lleida (2014–2016) and the University of Barcelona (2016–2019). He is Associate Editor for the International Journal of Human-Computer Studies and Interacting with Computers. He has served several times as Associate Chair for the CHI subcommittee on Ageing and Accessibility. Sergio won the Best Technical Paper Award at ACM-Web4All 2009. He earned his PhD (cum laude) in Computer Science and Human-Computer Interaction from Universitat Pompeu Fabra (Barcelona) in 2009.

• Introduction.- How We Define Older Adults.- How We Generate Knowledge in HCI and Aging.- Research Methodologies for Aging Populations.- Designing Technologies for Aging.- Conclusions and Future Directions.

Sergio Sayago is an Associate Professor of Human-Computer Interaction in Computer Science at the Universitat de Lleida (Spain). He is passionate about exploring the human side of digital technologies. His interdisciplinary research has spanned web accessibility, usability, and e-learning, with a strong focus since 2010 on older-adult HCI. Before joining UdL, Sergio held postdoctoral positions at the University of Dundee (Scotland, 2010–2012) under a Beatriu de Pinós fellowship and at Universidad Carlos III de Madrid (Spain, 2012–2014) with an Alliance 4 Universities fellowship. He later served as a visiting lecturer and researcher at the University of Lleida (2014–2016) and the University of Barcelona (2016–2019). He is Associate Editor for the International Journal of Human-Computer Studies and Interacting with Computers. He has served several times as Associate Chair for the CHI subcommittee on Ageing and Accessibility. Sergio won the Best Technical Paper Award at ACM-Web4All 2009. He earned his PhD (cum laude) in Computer Science and Human-Computer Interaction from Universitat Pompeu Fabra (Barcelona) in 2009.

• Introduction.- How We Define Older Adults.- How We Generate Knowledge in HCI and Aging.- Research Methodologies for Aging Populations.- Designing Technologies for Aging.- Conclusions and Future Directions.

Sergio Sayago is an Associate Professor of Human-Computer Interaction in Computer Science at the Universitat de Lleida (Spain). He is passionate about exploring the human side of digital technologies. His interdisciplinary research has spanned web accessibility, usability, and e-learning, with a strong focus since 2010 on older-adult HCI. Before joining UdL, Sergio held postdoctoral positions at the University of Dundee (Scotland, 2010–2012) under a Beatriu de Pinós fellowship and at Universidad Carlos III de Madrid (Spain, 2012–2014) with an Alliance 4 Universities fellowship. He later served as a visiting lecturer and researcher at the University of Lleida (2014–2016) and the University of Barcelona (2016–2019). He is Associate Editor for the International Journal of Human-Computer Studies and Interacting with Computers. He has served several times as Associate Chair for the CHI subcommittee on Ageing and Accessibility. Sergio won the Best Technical Paper Award at ACM-Web4All 2009. He earned his PhD (cum laude) in Computer Science and Human-Computer Interaction from Universitat Pompeu Fabra (Barcelona) in 2009.

• Introduction.- How We Define Older Adults.- How We Generate Knowledge in HCI and Aging.- Research Methodologies for Aging Populations.- Designing Technologies for Aging.- Conclusions and Future Directions.