We will be, sooner or later, not only handling personal computers but also mul- purpose cellular phones, complex personal digital assistants, devices that will be context-aware, and even wearable computers stitched to our clothes...we would like these personal systems to become transparent to the tasks they will be performing. In fact the best interface is an invisible one, one giving the user natural and fast access to the application he (or she) intends to be executed. The working group that organized this conference (the last of a long row!) tried to combine a powerful scientific program (with drastic refereeing) with an entertaining cultural program, so as to make your stay in Rome the most pleasant one all round: I do hope that this expectation becomes true. July 2005 Stefano Levialdi, IEEE Life Fellow INTERACT 2005 General Chairman [1] Peter J. Denning, ACM Communications, April 2005, vol. 48, N° 4, pp. 27-31. Editors' Preface INTERACT is one of the most important conferences in the area of Human-Computer Interaction at the world-wide level. We believe that this edition, which for the first time takes place in a Southern European country, will strengthen this role, and that Rome, with its history and beautiful setting provides a very congenial atmosphere for this conference. The theme of INTERACT 2005 is Communicating Naturally with Computers.

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One: Keynote Speakers.- Sketching and Experience Design.- Intelligent Architecture: Embedding Spaces with a Mind for Augmented Interaction.- The Future of Web Interfaces.- Two: Long Papers.- An Investigation into the Use of Tactons to Present Progress Information.- Haptizing Wind on a Weather Map with Reactive Force and Vibration.- Using ARToolKit Markers to Build Tangible Prototypes and Simulate Other Technologies.- Augmented Reality Painting and Collage: Evaluating Tangible Interaction in a Field Study.- Hotaru: Intuitive Manipulation Techniques for Projected Displays of Mobile Devices.- DIZI: A Digital Ink Zooming Interface for Document Annotation.- TractorBeam Selection Aids: Improving Target Acquisition for Pointing Input on Tabletop Displays.- Responsive Interaction Based on Sketch in Concept Styling.- Natural Language Query vs. Keyword Search: Effects of Task Complexity on Search Performance, Participant Perceptions, and Preferences.- "THAT's What I Was Looking For": Comparing User-Rated Relevance with Search Engine Rankings.- Effects of Display Configurations on Document Triage.- Searching for Music: How Feedback and Input-Control Change the Way We Search.- Galactic Dimensions: A Unifying Workstyle Model for User-Centered Design.- A Formal Description of Multimodal Interaction Techniques for Immersive Virtual Reality Applications.- Analysing User Confusion in Context Aware Mobile Applications.- Attach Me, Detach Me, Assemble Me Like You Work.- Bringing Dynamic Queries to Mobile Devices: A Visual Preference-Based Search Tool for Tourist Decision Support.- Mobile Photo Browsing with Pipelines and Spatial Cues.- Visual Interface and Control Modality: An Experiment About Fast Photo Browsing on Mobile Devices.- The Effect of Age and Font Size on Reading Text on Handheld Computers.- Fat Finger Worries: How Older and Younger Users Physically Interact with PDAs.- Flexible Reporting for Automated Usability and Accessibility Evaluation of Web Sites.- The Focus-Metaphor Approach: A Novel Concept for the Design of Adaptive and User-Centric Interfaces.- Working Out a Common Task: Design and Evaluation of User-Intelligent System Collaboration.- Interactivity and Expectation: Eliciting Learning Oriented Behavior with Tutorial Dialogue Systems.- Put Them Where? Towards Guidelines for Positioning Large Displays in Interactive Workspaces.- Analysis of User Behavior on High-Resolution Tiled Displays.- Interaction and Co-located Collaboration in Large Projection-Based Virtual Environments.- Using Real-Life Troubleshooting Interactions to Inform Self-assistance Design.- Feedback from Usability Evaluation to User Interface Design: Are Usability Reports Any Good?.- Assessing Interaction Styles in Web User Interfaces.- Usability Specialists - 'A Mommy Mob', 'Realistic Humanists' or 'Staid Researchers'? An Analysis of Usability Work in the Software Product Development.- Exposing Middle School Girls to Programming via Creative Tools.- Exploring Verbalization and Collaboration of Constructive Interaction with Children.- A Structured Expert Evaluation Method for the Evaluation of Children's Computer Games.- Usability Testing of Mobile Devices: A Comparison of Three Approaches.- Evaluating the Effectiveness of "Effective View Navigation" for Very Long Ordered Lists on Mobile Devices.- Understanding Situated Social Interactions in Public Places.- Benefits of Social Intelligence in Home Dialogue Systems.- Evolution of Norms in a Newly Forming Group.- A Comparison Between Spoken Queries and Menu-Based Interfaces for In-car Digital Music Selection.- A Sketching Tool for Designing Anyuser, Anyplatform, Anywhere User Interfaces.- FlowMouse: A Computer Vision-Based Pointing and Gesture Input Device.- Context of Use Evaluation of Peripheral Displays (CUEPD).- Improving Cell Phone Awareness by Using Calendar Information.- Evaluation of 12-DOF Input Devices for Navigation and Manipulation in Virtual Environments.- Integration of 3D Data and Text: The Effects of Text Positioning, Connectivity, and Visual Hints on Comprehension.- The Effect of Operational Mechanisms on Creativity in Design.- The Necessity of a Meeting Recording and Playback System, and the Benefit of Topic-Level Annotations to Meeting Browsing.- Key Issues in Interactive Problem Solving: An Empirical Investigation on Users Attitude.- Designing Natural Language and Structured Entry Methods for Privacy Policy Authoring.- Questionnaire-Based Research on Opinions of Visitors for Communication Robots at an Exhibition in Japan.- A Toolset for Creating Iconic Interfaces for Interactive Workspaces.- Designing Usable Interfaces with Cultural Dimensions.- Use of Future-Oriented Information in User-Centered Product Concept Ideation.- Wide vs. Narrow Paragraphs: An Eye Tracking Analysis.- Combining Eye Tracking and Conventional Techniques for Indications of User-Adaptability.- RealTourist - A Study of Augmenting Human-Human and Human-Computer Dialogue with Eye-Gaze Overlay.- A Synergistic Approach to Efficient Interactive Video Retrieval.- The Landscape of Time-Based Visual Presentation Primitives for Richer Video Experience.- Temporal Magic Lens: Combined Spatial and Temporal Query and Presentation.- Logging Events Crossing Architectural Boundaries.- Representing Unevenly-Spaced Time Series Data for Visualization and Interactive Exploration.- Multilevel Compound Tree - Construction Visualization and Interaction.- Visualizing Missing Data: Graph Interpretation User Study.- High-Level Visualization of Users' Navigation in Virtual Environments.- How Do People's Concepts of Place Relate to Physical Locations?.- The Territory Is the Map: Exploring the Use of Landmarks in Situ to Inform Mobile Guide Design.- Technology in Place: Dialogics of Technology, Place and Self.- Interaction and End-User Programming with a Context-Aware Mobile Application.- Three: Short Papers.- Large Visualizations for System Monitoring of Complex, Heterogeneous Systems.- The Challenge of Visualizing Patient Histories on a Mobile Device.- Static Visualization of Temporal Eye-Tracking Data.- Analytic Worksheets: A Framework to Support Human Analysis of Large Streaming Data Volumes.- Hundreds of Folders or One Ugly Pile - Strategies for Information Search and Re-access.- Exploring Results Organisation for Image Searching.- The SenseMS: Enriching the SMS Experience for Teens by Non-verbal Means.- TextTone: Expressing Emotion Through Text.- Lock-on-Chat: Boosting Anchored Conversation and Its Operation at a Technical Conference.- BROAFERENCE - A Next Generation Multimedia Terminal Providing D…