2 December 2005 Human-Computer Interaction Introduction, History and Interface Types Prof. Beat Signer Department of Computer Science Vrije Universiteit Brussel beatsigner.com Department of Computer Science Vrije Universiteit Brussel beatsigner.com 

Beat Signer - Department of Computer Science - [email protected] 2 September 22, 2025 Course Organisation ▪ Prof.Dr.Beat Signer Vrije Universiteit Brussel PL9.3.60 (Pleinlaan 9) +32 2 629 1239 [email protected] wise.vub.ac.be/beat-signer ▪ Ingela Rossing Vrije Universiteit Brussel PL9.3.56 (Pleinlaan 9) +32 2 629 3749 [email protected] wise.vub.ac.be/ingela-rossing 

Beat Signer - Department of Computer Science - [email protected] 3 September 22, 2025 Course Organisation … ▪ Bingyan Li Vrije Universiteit Brussel PL9.3.58 (Pleinlaan 9) +32 2 629 3487 [email protected] wise.vub.ac.be/bingyan-li A person with long hair wearing glasses Description automatically generated 

Beat Signer - Department of Computer Science - [email protected] 4 September 22, 2025 Course Goals ▪ After attending the course Human-Computer Inter- action, the student has an understanding of general HCI principles and user interface design guidelines as well as the interaction design process and its use for the human- centred design of digital and physical products. The student is able to reflect on the qualities and shortcomings of differ- ent interaction styles, while placing the user at the core of the interface design process. 

Beat Signer - Department of Computer Science - [email protected] 5 September 22, 2025 Course Goals … ▪ The student can apply the theoretical background, the human-computer interaction principles and the inter- action design lifecycle model discussed in the course to create interfaces with good usability and user experience. Students are further able to explain their decisions based on the theory as well requirements analysis and evaluations. ▪ The student is able to assess the usability and effective- ness of user interfaces by using the tools and principles studied during the course. Based on these tools and princi- ples, the student is further able to match different interface and interaction types for a given context. 

Beat Signer - Department of Computer Science - [email protected] 6 September 22, 2025 Exercises ▪ The course content is further investigated in the exercise sessions ▪ the topics covered in the exercise sessions will also be helpful for the assignment ▪ Additional content might be covered in exercises ▪ strongly recommended to attend all exercise sessions! ▪ exam covers content of lectures and exercises ▪ Exercise sessions ▪ assistants: Ingela Rossing ([email protected]) and Bingyan Li ([email protected]) ▪ 3 groups (starting on October 1) - WPO1: Thursday 11:00–13:00 in P2.0.07, WPO2: Wednesday 16:00–18:00 in D.2.16 and WPO3: Thursday 16:00–18:00 in D3.13 

Beat Signer - Department of Computer Science - [email protected] 7 September 22, 2025 Course Material ▪ All material will be available on Canvas ▪ lecture slides, exercises, research papers, tutorials, ... ▪ Make sure that you are subscribed to the Human-Computer Interaction course on Canvas ▪ https://canvas.vub.be/courses/45093 ▪ Handouts are on Canvas the day before the lecture ▪ slides will also be available on the WISE website - https://wise.vub.ac.be/course/human-computer-interaction 

Beat Signer - Department of Computer Science - [email protected] 8 September 22, 2025 Lecture Schedule Exercise 1: Discussion of Existing Interfaces and Interactions 3 4 5 6 Lecture 2: HCI and Interaction Design Lecture 3: Requirements Analysis and Prototyping Exercise 2: Requirements Analysis Lecture 4: Human Perception and Cognition Lecture 7: HCI Research Methods Exercise 5: Project Feedback (Low-Fidelity Prototype) P2.04 D.0.05 P2.04 P2.04 P2.07 / D.2.16 / D.3.13 P2.07 / D.2.16 / D.3.13 D.3.05 / K.2.52 / D.3.13 7 8 E.1.02 Lecture 1: Introduction, History and Interface Types 2 No Exercise Exercise 3: Low-Fidelity Prototyping P2.07 / D.2.16 / D.3.13 P2.04 Lecture 5: Design Guidelines and Models Exercise 4: Mid-Fidelity Prototyping (FIGMA) and Design Validation P2.04 P2.07 / K.2.52 / D.3.13 D.2.23 No Exercise Lecture 6: Evaluation Methods P2.04 

Beat Signer - Department of Computer Science - [email protected] 9 September 22, 2025 Lecture Schedule … No Lecture No Exercise 10 11 12 13 14 No Lecture No Lecture No Exercise Exercise 7: Evaluation (Usability / User Experience) 9 Exercise 6: Heuristic Evaluation No Lecture D.3.05 / K.2.52 / D.3.13 D.3.05 / K.2.52 / I.1.01 Lecture 8: Use Cases and Course Review No Exercise P2.0.04 No Lecture Exercise 8: Project Presentation D.3.05 / K.2.52 / D.3.13 

Beat Signer - Department of Computer Science - [email protected] 10 September 22, 2025 Assignment ▪ New applications for Brussels/Belgium ▪ you will design one of five different applications (Recreation and Free Time, Library, Brussels International Students, VUB Cafeteria App or Active Senior Gatherings) - project report, videos of prototypes and final presentation - evaluated based on creativity, application of Interaction Design process and HCI guidelines, documentation, requirements analysis and evaluation, prototypes and final presentation ▪ Assignment handed out in week 3 ▪ group project with 4 students per group - send an email with the 4 group members and your team name to Ingela Rossing by Friday, October 3 ([email protected]) - final presentation (week of December 15), report and videos (December 23) ▪ assignment counts for 50% of the final grade 

Beat Signer - Department of Computer Science - [email protected] 11 September 22, 2025 Exam ▪ Written closed book exam ▪ covers content of lectures and exercises ▪ counts 50% for the overall grade ▪ Overall grade = written exam (50%) + assignment (50%) ▪ for the assignment students have some flexibility in distributing the grades (±2 points) ▪ note that the grade for the written exam as well as for the assign- ment have to be 8/20 or higher in order to pass the exam! 

Beat Signer - Department of Computer Science - [email protected] 12 September 22, 2025 Course Outline 1. Introduction ▪ history of human-computer interaction ▪ interface types 2. HCI and Interaction Design ▪ human-computer interaction, interaction design process ▪ understanding and conceptualising interaction 3. Requirements Analysis and Prototyping ▪ data gathering and analysis for requirements ▪ different types of prototyping 4. Human Perception and Cognition ▪ vision, attention, recognition, memory, … ▪ hand-eye coordination 

Beat Signer - Department of Computer Science - [email protected] 13 September 22, 2025 Course Outline … 5. Design Guidelines and Models 6. Evaluation Methods ▪ DECIDE framework, usability testing, experiments, field testing, heuristic evaluations, A/B testing, predictive models 7. HCI Research Methods 8. Use Cases and Course Review ▪ various use cases ▪ course review and questions about exam 

Beat Signer - Department of Computer Science - [email protected] 14 September 22, 2025 Human-Computer Interaction ▪ Human-Computer Interaction is a multidisciplinary field ▪ Computer Science ▪ Design ▪ Cognitive Science ▪ Psychology ▪ … Human-computer interaction is a discipline concerned with the design, evaluation and implementation of interactive computing systems for human use and with the study of major phenomena surrounding them. ACM SIGCHI Curricula for Human-Computer Interaction 

Beat Signer - Department of Computer Science - [email protected] 15 September 22, 2025 Beyond Human-Computer Interaction Interaction design addresses the design of interactive products to support the way people communicate and interact in their everyday and working lives. Y. Rogers, H. Sharp and J. Preece, Interaction Design: Beyond Human-Computer Interaction Interaction Design (IxD) defines the structure and behavior of interactive systems. Interaction Designers strive to create meaningful relationships between people and the products and services that they use, from computers to mobile devices to appliances and beyond. ixd.org 

Beat Signer - Department of Computer Science - [email protected] 16 September 22, 2025 Interaction Design (IxD) [Illustration by Dan Saffer] 

Beat Signer - Department of Computer Science - [email protected] 17 September 22, 2025 Analogue Computers ▪ Focus on technology and not on human-machine interaction (HMI) ▪ Only trained engineers could use the machines ▪ Interaction was limited to the programming of the machines (e.g.punched cards) and the printing of results 

Beat Signer - Department of Computer Science - [email protected] 18 September 22, 2025 Sketchpad (1963) ▪ Sketchpad developed as part of Ivan Sutherland’s PhD thesis at MIT ▪ drawing tool ▪ light pen and buttons ▪ first graphical user interface ▪ direct manipulation of graphical objects ▪ basis for many new interface ideas 

Beat Signer - Department of Computer Science - [email protected] 19 September 22, 2025 The Mother of All Demos (1968) ▪ Douglas Engelbart and his colleagues at the Stanford Research Institute developed the oNLine System (NLS) as part of the Augment Project ▪ vision about the future of interactive computing ▪ NLS was demonstrated at the Fall Joint Computer Conference in 1968 ▪ showed first practical use of hypertext ▪ computer mouse ▪ remote collaboration (connected computers) ▪ raster-scan video monitors ▪ screen windows ▪ ... Douglas Engelbart 

Beat Signer - Department of Computer Science - [email protected] 20 September 22, 2025 NLS Demo 

Beat Signer - Department of Computer Science - [email protected] 21 September 22, 2025 Xerox Alto (1973) and Xerox Star (1981) ▪ Personal workstation ▪ LAN to share resources ▪ Desktop metaphor ▪ windows, icons, menus, pointer (WIMP) interaction ▪ "filing cabinets" with hierarchical folders ▪ seeing and pointing rather than remembering and typing ▪ "What You See Is What You Get" (WYSIWYG) Xerox Star 8010 [http://www.digibarn.com/collections/systems/xerox-8010/] 

Beat Signer - Department of Computer Science - [email protected] 22 September 22, 2025 Apple Macintosh (1984) ▪ Successor of Apple Lisa ▪ corrected some mistakes ▪ aggressive pricing ▪ Old ideas (e.g. Xerox Star) but well executed ▪ Domination in the desktop publishing sector ▪ excellent graphics ▪ affordable laser printers 

Beat Signer - Department of Computer Science - [email protected] 23 September 22, 2025 "Evolution" of Interfaces date January 1984 January 2025 +41 years price $2500 $3999 × 1.6 CPU 68000 Motorola 8 MHz 0.7 MIPS 28-core M3 Ultra 4.06 GHz 21.2 TFLOPS × 508 × 30280000 memory 128kB 98GB × 765000 storage 400 kB floppy drive 1 TB SSD drive × 2684000 monitor 9" black and white 512 x 342 68dpi 27" colour 5120 x 2880 218dpi × 3 × 84 × 3.2 devices mouse keyboard mouse keyboard same same GUI desktop WIMP desktop WIMP same [partly based on Beaudouin-Lafon 2004] original Macintosh Mac Studio comparison 

Beat Signer - Department of Computer Science - [email protected] 24 September 22, 2025 Recent Changes and Opportunities in HCI ▪ Advances in graphical interfaces, speech, gesture and handwriting recognition, and artificial intelligence ▪ Emergence of the Internet, cell phones, wireless networks, sensor technologies as well as large and small screens ▪ innovative interaction with digital information and services ▪ combining the physical and digital in new ways - mixed reality, cross-media technologies, tangible interfaces, wearable computing, ... ▪ collaborative interfaces with social interaction 

Beat Signer - Department of Computer Science - [email protected] 25 September 22, 2025 Interface Types ▪ Command-based ▪ WIMP and GUI ▪ Virtual reality ▪ Web ▪ Consumer electronics ▪ Mobile ▪ Speech (Voice) ▪ Pen ▪ Touch ▪ Gesture ▪ Haptic ▪ Gaze-based ▪ Multimodal ▪ Shareable ▪ Tangible ▪ Augmented and mixed reality ▪ Wearable ▪ Robots ▪ Brain-computer ▪ Smart (human-AI) ▪ … 

Beat Signer - Department of Computer Science - [email protected] 26 September 22, 2025 Command-based Interfaces ▪ Typing commands such as ls or rm in command line ▪ Combination of keys such as Ctrl+c and Ctrl+v ▪ Superseded by GUIs ▪ Still used by experts ▪ batch processing ▪ Alternative to GUIs for visually impaired users ▪ e.g.command-line interface for Second Life ▪ Syntax (e.g. how to combine commands) ▪ Which names can be remembered best ▪ Consistency in labeling and naming of commands 

Beat Signer - Department of Computer Science - [email protected] 27 September 22, 2025 WIMP and GUI ▪ Originated from Xerox Star interface ▪ Windows ▪ scroll, stretch, overlap, open, close, move ▪ Icons ▪ representing applications, objects or commands ▪ Menus ▪ scrollable list of options ▪ Pointer /Pointing Device ▪ mouse controlling the cursor Original 1984 Mac OS desktop Comodore 64, Magic Desk, 1983 

Beat Signer - Department of Computer Science - [email protected] 28 September 22, 2025 Windows ▪ Overcome physical screen constraints ▪ view more information ▪ perform multiple tasks ▪ Various forms to navigate through windows ▪ Dialogue boxes ▪ can be modal to control the interaction ▪ how to control interaction in post-WIMP or non-graphical interfaces? ▪ Window management to move between different windows and screens ▪ Design principles of spacing, grouping and simplicity to present information 

Beat Signer - Department of Computer Science - [email protected] 29 September 22, 2025 Icons ▪ Easier to learn and re- member than text labels ▪ objects and operations ▪ Can easily be arranged on screen ▪ Different styles ▪ photo-realistic images ▪ logo-style images ▪ Also used in consumer products (e.g.digital cameras) ▪ Various guidelines and style guides for icon design ▪ Icons can be used in combination with labels ▪ e.g. for toolbars with small icons 

Beat Signer - Department of Computer Science - [email protected] 30 September 22, 2025 Menus ▪ Different menu interface styles ▪ flat lists, drop-down, pop-up, scrolling, contextual, expanding, … ▪ Often nested list of options ▪ Scrolling through long lists can be frustrating ▪ new controls such as mouse scroll wheel ▪ Carefully think about the best terms for menu options ▪ Choose menu type based on application and display size ▪ flat menus vs. expanding menus 

Beat Signer - Department of Computer Science - [email protected] 31 September 22, 2025 Virtual Reality Interfaces ▪ Computer-generated graphical simulations ▪ illusion of participation in a virtual environment (VE) ▪ Use of CAVEs (Cave Automatic Virtual Environment) or headsets ▪ New ways of navigating in 3D space ▪ First-person view or third- person perspective ▪ How to prevent users from experiencing nausea ▪ Identify most effective ways for navigation ▪ Best ways to interact with information Meta Quest 3 headset 

Beat Signer - Department of Computer Science - [email protected] 32 September 22, 2025 Web Interfaces ▪ Website should be ▪ aesthetically pleasing ▪ usable ▪ easy to maintain ▪ Users do often not read all the content on a page before following a link ▪ Bring the desktop to the browser ▪ HTML5 and JavaScript ▪ AJAX ▪ … ▪ Emphasis on content and the use of links for navigation ▪ Where am I? What’s here? Where can I go? ▪ Web Content Accessibility Guidelines (WCAG) 

Beat Signer - Department of Computer Science - [email protected] 33 September 22, 2025 Consumer Electronics and Appliances ▪ Machines and devices for everyday use in the home, public place, car, … ▪ remote controls ▪ digital clocks ▪ DVD players ▪ washing machines ▪ … ▪ Get specific tasks done in a short period of time ▪ less time to read a manual or explore the interface ▪ Interfaces for short interactions ▪ Simplicity ▪ Visibility of status information ▪ Physical controls vs. touch screens 

Beat Signer - Department of Computer Science - [email protected] 34 September 22, 2025 Mobile Interfaces ▪ Main difference in size and portability ▪ ready at hand 24/7 ▪ Real-time access to contextual information ▪ scanning product barcodes while shopping ▪ scanning QR codes ▪ Location-based services and recommendations ▪ Small screen and limited control space ▪ Various guidelines on how to design mobile interfaces ▪ Privacy issues ▪ location sharing applications 

Beat Signer - Department of Computer Science - [email protected] 35 September 22, 2025 Speech (Voice) Interfaces ▪ Various applications ▪ flight times or buying a ticket ▪ replace touchtone navigation ▪ real-time translators ▪ Supports visually impaired users ▪ Voice recognition and text- to-speech technology ▪ specific grammars to improve recognition rate ▪ barge-in ▪ Natural interfaces vs. voice- based menu navigation ▪ Type of voice actor ▪ Immediate confirmation of requests 

Beat Signer - Department of Computer Science - [email protected] 36 September 22, 2025 Pen Interfaces ▪ Based on writing skills developed from childhood ▪ digitalisation of handwriting ▪ Stylus on screen vs.digital pen and paper ▪ Quick and easy way to annotate documents ▪ Intuitive interfaces to integrate physical paper with digital information and services ▪ Switching from writing, annotating or sketching to the execution of commands ▪ context-sensitive menus ▪ Feedback for digital pen and paper interfaces edfestComponents EdFest, Global Information Systems Group, ETH Zurich 

Beat Signer - Department of Computer Science - [email protected] 37 September 22, 2025 Touch Interfaces ▪ Already in use for quite some time ▪ ticket machines, museum guides, ATMs ▪ More recently muIti-touch interfaces for smartphones ▪ swiping, tapping, pinching, … ▪ Use of gestures for interacting with digital content ▪ New forms of consuming, creating and searching digital content compared to mouse and keyboard ▪ e.g. swiping virtual keyboards Microsoft PixelSense technology 

Beat Signer - Department of Computer Science - [email protected] 38 September 22, 2025 Gesture-based Interfaces ▪ Tracking of people’s body, arm and hand gestures ▪ Nintendo Wiimote ▪ Microsoft Kinect ▪ … ▪ Mid-air gestures also used for controlling home appliances ▪ Sign language interpreters ▪ Detection (start / end) and recognition of mid-air gestures ▪ continous input stream ▪ Gestures vs. unconscious gesticulation ▪ Control device vs. hands-free Microsoft Kinect 

Beat Signer - Department of Computer Science - [email protected] 39 September 22, 2025 Gaze-based Interfaces ▪ Control computer by simply looking at it ▪ Very fast and accurate hands-free input ▪ Good for pointing but less suited for smooth drawing ▪ Useful for evaluations in HCI ▪ Increasing use in Virtual and Mixed Reality ▪ Often needs some initial calibration ▪ How to distinguish deliberate gazing from accidental glancing? Canon EOS R3 Eye Control AF 

Beat Signer - Department of Computer Science - [email protected] 40 September 22, 2025 Multimodal Interfaces ▪ Enriched user experience by using multiple input and output modalities ▪ speech and gesture ▪ eye-gaze and gesture ▪ pen input and speech ▪ … ▪ Multiple modalities might be used simultaneously or alternately ▪ Recognition and calibration of different aspects of a user’s behaviour is more difficult ▪ Identify gains of combining different input and output modalities SpeeG2, WISE lab, VUB 

Beat Signer - Department of Computer Science - [email protected] 41 September 22, 2025 Shareable Interfaces ▪ Multi-user interfaces for flexible group work and content creation ▪ Shared point of reference ▪ Some interfaces have become an integrated part of furniture ▪ New forms of collaborative interaction based on large shareable surfaces ▪ Effect of size, shape and orientation of surface ▪ Shared vs. private space DiamondTouch tabletop 

Beat Signer - Department of Computer Science - [email protected] 42 September 22, 2025 Tangible Interfaces ▪ Physical objects are coupled with digital representations ▪ Sensing of physical objects and feedback in digital or physical space ▪ Interplay of different devices and objects ▪ no enforced sequencing and no modal interaction ▪ Affordances of interface objects guide the user ▪ Coupling between physical action and effect ▪ where to provide digital feedback ▪ What kind of physical artefacts should be used ▪ bricks, cubes, sticky notes, … ArtVis, WISE lab, VUB 

Beat Signer - Department of Computer Science - [email protected] 43 September 22, 2025 Augmented and Mixed Reality ▪ Augmentation of the physical environment with digital information and services ▪ Information can be visualised (overlaid) in different ways ▪ head-mounted displays (HMDs) ▪ handheld displays ▪ fixed installations Microsoft HoloLens ▪ Form of the digital augmentation and when and where it should be applied ▪ Very different designs ▪ playful learning experience ▪ medical application 

Beat Signer - Department of Computer Science - [email protected] 44 September 22, 2025 Wearable Interfaces ▪ Various new materials ▪ flexible display technologies ▪ e-textiles ▪ Glasses, jewellery, shoes or jackets as user interfaces ▪ Wearable technology for remote awareness ▪ Hug Shirt by CuteCircuit for mobile phone calls ▪ Wearable interfaces have to be comfortable ▪ Hygiene is an issue ▪ washing of e-textiles ▪ Social acceptance and privacy Smart contact lens 

Beat Signer - Department of Computer Science - [email protected] 45 September 22, 2025 Robots ▪ Originally used in manufacturing assembly lines and to investigate hazardous locations ▪ More recently domestic robots for cleaning and gardening ▪ e.g.Roomba iRobot ▪ Pet robots and human-like robots used in therapies ▪ Ethical concerns ▪ robots with human- or animal-like behaviour ▪ Communication with robots ▪ human-”human” vs. human- machine interaction Emergent Communication, AI lab, VUB 

Beat Signer - Department of Computer Science - [email protected] 46 September 22, 2025 Brain Computer Interfaces ▪ Communication between a user’s brain waves and an external device ▪ electrodes detect electric signals moving between neurons ▪ Brain computer interfaces (BCI) can also help disabled user’s ▪ interaction with computers ▪ reconnect brain to muscles EPOC, emotiv ▪ Brain computer interfaces should be comfortable ▪ Number of different actions / commands that can be executed 

Beat Signer - Department of Computer Science - [email protected] 47 September 22, 2025 Smart/Intelligent Interfaces ▪ Smart devices commu- nicating with users and other devices ▪ often learn the context and user behaviour (AI) ▪ implicit interactions do not have to be triggered by user ▪ Smart environments such as smart homes or offices eSPACE authoring tool, WISE lab, VUB ▪ Minimise mismatch between user expectations and actions triggered by the system ▪ Intelligibility offers users insights about the system behaviour A screenshot of a computer AI-generated content may be incorrect. 

Beat Signer - Department of Computer Science - [email protected] 48 September 22, 2025 Which Interface Should We Use? ▪ In the last few years there is a significant increase in the number of user interface types ▪ How to decide which interface is preferable for a given task or activity? ▪ multimedia vs. tangible interface for learning ▪ speech vs. command-based interface ▪ multimodal vs. monomodal interface ▪ wearable vs. mobile interface ▪ virtual reality vs. augmented reality ▪ Many of these questions are currently being researched ▪ this course will provide you some more insights about the design process and human-computer interaction-related issues 

Beat Signer - Department of Computer Science - [email protected] 49 September 22, 2025 Exercise 1 ▪ Discussion of existing human-computer interfaces and interactions 

Beat Signer - Department of Computer Science - [email protected] 50 September 22, 2025 Further Reading ▪ Parts of this lecture are based on the book Interaction Design: Beyond Human-Computer Interaction ▪ chapter 7 - Interface Types 

Beat Signer - Department of Computer Science - [email protected] 51 September 22, 2025 References ▪ Interaction Design: Beyond Human-Computer Interaction, Yvonne Rogers, Helen Sharp and Jenny Preece, Wiley (6th edition), April 2023 ISBN-13: 978-1119901099 ▪ Designing with the Mind in Mind: Simple Guide to Understanding User Interface Design Guidelines, Jeff Johnson, Morgan Kaufmann (3rd edition), November 2020, ISBN-13: 978-0192864550 ▪ Introduction to Human-Computer Interaction, Kasper Hornbaek, Per Ola Kristensson and Antti Oulasvirta, Oxford University Press, September 2025, ISBN-13: 978-0130461094 

Beat Signer - Department of Computer Science - [email protected] 52 September 22, 2025 References ... ▪ Research Methods in Human-Computer Inter- action, Jonathan Lazar, Jinjuan Heidi Feng and Harry Hochheiser, Morgan Kaufmann (2nd edition), May 2019, ISBN-13: 978-0128053904 ▪ Designing for Interaction: Creating Innovative Applications and Devices, Dan Saffer, New Riders (2nd edition), August 2009 ISBN-13: 978-0321643391 ▪ The Design of Everyday Things, Don Norman, Basic Books (revised and expanded edition), November 2013, ISBN-13: 978-0465050659 

Beat Signer - Department of Computer Science - [email protected] 53 September 22, 2025 References ... ▪ B. Signer, Pen-based Interaction, Handbook of Human Computer Interaction, Major Reference Work, Springer Nature, 2025 ▪ https://beatsigner.com/publications/pen-based-interaction.pdf ▪ M.C. Norrie, B. Signer, M. Grossniklaus, R. Belotti, C. Decurtins and N. Weibel, Context-Aware Platform for Mobile Data Management, Wireless Networks (WINET), 13(6), Springer, December 2007 ▪ https://beatsigner.com/publications/norrie_WINET2007.pdf 

Beat Signer - Department of Computer Science - [email protected] 54 September 22, 2025 References ... ▪ L. Hoste and B. Signer, SpeeG2: A Speech- and Gesture-based Interface for Efficient Controller-free Text Entry, Proceedings of the 15th International Conference on Multimodal Interaction (ICMI 2013), Sydney, Australia, December 2013 ▪ https://beatsigner.com/publications/hoste_ICMI2013.pdf ▪ B. Dumas, B. Moerman, S. Trullemans and B. Signer, ArtVis: Combining Advanced Visualisation and Tangible Interaction for the Exploration, Analysis and Browsing of Digital Artwork Collections, Proceedings of AVI 2014, Como, Italy, May 2014 ▪ https://beatsigner.com/publications/dumas_AVI2014.pdf 

Beat Signer - Department of Computer Science - [email protected] 55 September 22, 2025 References ... ▪ A. Sanctorum and B. Signer, eSPACE: Leveraging Theoretical Foundations for the End-User Development of Cross-Device and IoT Applications, ACM Transactions on Computer-Human Interaction (TOCHI), February 2025 ▪ https://beatsigner.com/publications/sanctorum_TOCHI2025.pdf ▪ B. Signer, Towards Cross-Media Information Spaces and Architectures, Proceedings of the 13th International Con- ference on Research Challenges in Information Science (RCIS 2019), Brussels, Belgium, May 2019 ▪ https://beatsigner.com/publications/signer_RCIS2019.pdf 

Beat Signer - Department of Computer Science - [email protected] 56 September 22, 2025 References ... ▪ Sketchpad Demo ▪ https://www.youtube.com/watch?v=6orsmFndx_o ▪ Videos of the NLS demo ▪ https://www.youtube.com/watch?v=yJDv-zdhzMY 

2 December 2005 Next Lecture HCI and Interaction Design