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Assessing human bodies’ postures and positions enables to design new interaction techniques, to understand users’ performances and to evaluate ergonomics of devices. In addition to the applications for improving Human-Com-puter Interaction, human movement analysis is at the heart of other types of us-ages including sports, rehabilitation, gesture recognition, etc. This workshop aims at providing a platform for researchers and designers to discuss the challenges related to the processing (e.g., data collection, treatment, interpretation, recognition) of human movement (e.g., motor skills, amplitude of movements, limitations). We expect to identify the main challenges to be addressed and come up with a research agenda to give HCI new perspectives and suggest promising directions

Task modeling consists of a fundamental activity that initiates usercentered design in user interface development. It is therefore important to reach the best task model possible and that the task modeling activity remains consistent when the task modeler changes. For this purpose, this paper introduces a set of criteria in order to identify tasks during task modeling in an unambiguous way that results into a task model exhibiting desired properties of quality such as completeness, consistency. In addition, starting and stopping criteria provide designers with guidance on when and how to start and finish the task modeling.

In this paper we present a new algorithm for automatic recognition of hand drawn sketches based on the Levenshtein distance. The purpose for drawing sketches in our application is to create graphical user interfaces in a similar manner as the well established paper sketching. The new algorithm is trainable by every user and improves the recognition performance of the techniques which were used before for widget recognition. In addition, this algorithm ay serve for recognizing other types of sketches, such as letters, figures, and commands. In this way, there is no modality disruption at sketching time.

Part 3: Task Modelling and Task-Based Approaches; International audience; Testing interactive systems is known to be a complex task that cannot be exhaustive. Indeed, the infinite number of combination of user input and the complexity of information presentation exceed the practical limits of exhaustive and analytical approach to testing [31]. Most interactive software testing techniques are produced by applying and tuning techniques from the field of software testing to try to address the specificities of interactive applications. When some elements cannot be taken into account by the software testing technique, they are usually ignored. In this paper we propose to follow an opposite approach, starting from a generic architecture for interactive systems (including both software and hardware elements) for identifying in a systematic way, testing problems and testing needs. This architecture-driven approach makes it possible to identify how software testing knowledge and techniques can support interactive systems testing but also where the interactive systems engineering community should invest in order to test their idiosyncrasies too.

Part 1: User-Centred Design Approaches; International audience; The number of physiotherapists and occupational therapists is not sufficient to cope with the demands of the increasing number of stroke survivors worldwide. These patients need specific training to promote recovery and prevent stroke-related disability. The paper discusses aspects how a social humanoid robots might serve as therapeutic assistant. It is not intended to replace human therapists, but to provide them with therapeutic assistance once therapeutic decisions are taken and the therapy has been introduced to the patient by the human therapists and the day to day practice needs to be supervised. The paper provides a case study of an HCD approach and exemplifies the strategy of digitalizing training tasks, the identification of exceptions, and ways of modelling the dynamic behaviour of the humanoid robot. This is demonstrated by task models. Some extensions of task models are suggested.

Part 4: Poster and Demos; International audience; Ambient Assisted Living (AAL) promotes the assistance of a patient at home according to her/his Clinical Pathway, i.e., a set of diagnostic and therapeutic procedures related to the treatment of that specific patient. AAL is increasingly gaining momentum thanks to the Internet of Things (IoT). Edge-Computing would boost the AAL success, since this kind of architecture promotes a sort of distributed cloud computing at the edges of the IoT network, thus reducing latency and improving reliability. This poster paper focuses on the implementation, in a AAL system based on such an IoT-Edge-Computing coupled architecture, of an anomaly detection module able to detect deviations from the patient’s Clinical Pathway (CP) and avoid processing of inconsistent or fake data, which could result in a serious life-threatening for a patient.

Part 2: Model-Based and Model-Driven Approaches; International audience; Since the publication of agile manifesto in 2001, agile methodologies has been gaining significant interest in both software industry and research community. Agile User-Centered Design (AUCD) assesses the challenge of integrating agile development with user experience and usability techniques. Although both methodologies have similarities, their scope and perspective are different and difficult to integrate. The eHealth domain implies additional challenges in terms of usability, due to the differences between healthcare professionals, and lack of knowledge of the day-to-day work carried out in different care tiers. Therefore, the challenge is twofold: to achieve an adequate symbiosis of work between teams, and design a solution adapted to the needs of diverse stakeholders with vast differences in their context of use. We designed a lightweight AUCD process adapted to such situation, and we present our experience in the design and implementation of such development process for the development of a system to monitor frailty in elder patients with support for both community and specialized care. As a result, our UCD process has achieved both iterative and incremental value generation, maintaining a good coordination between developers and UX designers, and resulting on a usable solution with regard to target users.

Part 4: Poster and Demos; International audience; In the field of Human-Computer Interaction there is considerable awareness on diversity and inclusion. At the same time topics such as gender and race have become more prominent recently. One aspect that has received little attention, however, is the possible reproduction of real-world socio-demographic inequality structures through recommendation systems in fashion. To investigate gender-specific differences in recommender systems, we utilise data from Amazon and use quantile regressions to calculate what price differences exist for the recommended products concerning the primary product. Our results show a bias in recommended pricing premiums about addressed gender. While a higher price in comparison to the viewed product is charged for all genders, product recommendations for women generally show a higher premium than those for men (about 5% more at the median, ceteris paribus). This can be influenced by the starting price and the popularity of the product, i.e. the sales ranking.

Part 4: Poster and Demos; International audience; Mobile shopping apps have been using Augmented Reality (AR) in the last years to place their products in the environment of the customer. While this is possible with atomic 3D objects, there is still a lack in the runtime configuration of 3D object compositions based on user needs and environmental constraints. For this, we previously developed an approach for model-based AR-assisted product configuration based on the concept of Dynamic Software Product Lines. In this demonstration paper, we present the corresponding tool support ProConAR in the form of a Product Modeler and a Product Configurator. While the Product Modeler is an Angular web app that splits products (e.g. table) up into atomic parts (e.g. tabletop, table legs, funnier) and saves it within a configuration model, the Product Configurator is an Android client that uses the configuration model to place different product configurations within the environment of the customer. We show technical details of our ready to use tool-chain ProConAR by describing its implementation and usage as well as pointing out future research directions.

Part 2: Model-Based and Model-Driven Approaches; International audience; Augmented Reality (AR) has recently found high attention in mobile shopping apps such as in domains like furniture or decoration. Here, the developers of the apps focus on the positioning of atomic 3D objects in the physical environment. With this focus, they neglect the configuration of multi-faceted 3D object composition according to the user needs and environmental constraints. To tackle these challenges, we present a model-based approach to support AR-assisted product configuration based on the concept of Dynamic Software Product Lines. Our approach splits products (e.g. table) into parts (e.g. tabletop, table legs, funnier) with their 3D objects and additional information (e.g. name, price). The possible products, which can be configured out of these parts, are stored in a feature model. At runtime, this feature model can be used to configure 3D object compositions out of the product parts and adapt to user needs and environmental constraints. The benefits of this approach are demonstrated by a case study of configuring modular kitchens with the help of a prototypical mobile-based implementation.

Part 1: User-Centred Design Approaches; International audience; This paper reviews a user-centered agile systems design process, in the context of facilitating an educational environment. It focuses on the design of an ICT tool to support teachers in building an inclusive learning environment for children with Special Educational Needs (SEN), applying the “Index of Inclusion” (IoI) as a framework that directs the development process. The IoI is a set of guidelines that offers schools a supportive process of self-review and development when it comes to SEN; it draws on the views of staff in the educational sector. Extracting a requirements specification from a theoretical framework can be challenging. This study investigates how end-users, clients and stakeholders’ involvement in the development process can be used with the aim of establishing design implications. The outcomes suggest that integration of user experience in the development processes, design ideas, and/or framework can be useful for software developers, specifically when working with diverging needs and perspectives.

Software development encompasses many collaborative tasks in which usually several persons are involved. Close collaboration and the synchronization of different members of the development team require effective communication. One established communication channel are meetings which are, however, often not as effective as expected. Several approaches already focused on the analysis of meetings to determine the reasons for inefficiency and dissatisfying meeting outcomes. In addition to meetings, text-based communication channels such as chats and e-mails are frequently used in development teams. Communication via these channels requires a similar appropriate behavior as in meetings to achieve a satisfying and expedient collaboration. However, these channels have not yet been extensively examined in research. In this paper, we present an approach for analyzing interpersonal behavior in text-based communication concerning the conversational tone, the familiarity of sender and receiver, the sender's emotionality, and the appropriateness of the used language. We evaluate our approach in an industrial case study based on 1947 messages sent in a group chat in Zulip over 5.5 months. Using our approach, it was possible to automatically classify written sentences as positive, neutral, or negative with an average accuracy of 62.97% compared to human ratings. Despite this coarse-grained classification, it is possible to gain an overall picture of the adequacy of the textual communication and tendencies in the group mood., Published in the proceedings of the 8th International Conference on Human-Centered Software Engineering

Part 1: Beyond Computers: Wearables, Humans, and Things - WHAT!; International audience; We introduce the rapid change of the visual art ecosystem, triggered by current science and technology development. ICT enables new multimedia based an interactive art forms, with an increasing variety of stakeholders. We provide examples of audience involvement, of immersion, and of brain-computer interaction as a new paradigm for participation. We point to the use of new material dimensions, as well as to expanding shared creation and cognition. We also point to opportunities to apply this development to accommodate special needs. In order to support the dissemination of these possibilities, we advocate the development of a task-modeling based ontology to describe, analyse, and support the evolving art ecosystem.

Part 2: User Experiences and Wellbeing at Work (UX@Work); International audience; To improve human performance, interactive technologies are going towards more automated systems that involve computers, robots and cyber-physical systems into the decision-making process. While automation can lead to increased performance and reduced impact of human errors, interactive technologies without optimal design can have a negative impact on the experience of operators and end-users, leading to suboptimal performance of the automated systems. In this research, we aim to evaluate and refine Human Work Interaction Design (HWID) framework to be applicable in various highly-automated settings including Industry 4.0 environments. This will be performed via a thorough literature review as the first step. The list of identified factors playing a potential role in various interactive systems will then be evaluated and optimised in three case studies. We will try to understand how to maximise collaborations between the users and the machine in interactive systems. A practical approach for evaluating both employees’ and end-users’ perspectives in three scenarios with different levels of automation will be assessed. We will evaluate the outputs in multiple levels of organisations, employees and end-users. The ultimate output of the study will be a framework or model that will help in designing future research studies for various automation scenarios, especially semi-autonomous systems that involve high levels of interaction between users and the machine. We will provide guidelines for implementation of the proposed framework in different scenarios. We expect that the framework output of this research will provide a comprehensive guideline applicable to many Industry 4.0 technologies.

Part 2: Model-Based and Model-Driven Approaches; International audience; Internet of Things (IoT), and in general the Internet of Everything (IoE), are deeply influencing the business processes Digital Transformation, also in the Public Administration context, introducing new actors and interactions among People, Process, Data and Things. Therefore, a re-design of the processes or the creation of new ones is necessary, in a way that the design of a public service meets needs and skills of different end users (citizens, business managers, experts, etc.). This paper presents a framework for the design of public service user interfaces that, on the basis of domain ontologies and BPMn extensions, support the modeling of new interactions with IoT and bot services, in particular Telegram Bots, in the context of public administration processes. A service semantic annotation model can be shared with and reused by other organizations, thus reducing the user interface design and implementation time, and consequently the overall service development time.

To develop well designed socio-technical systems for a particular context user involvement is essential. Emerging software development approaches that enable continuous delivery of software functionalities provide new opportunities as to how users can be involved in shaping the design. We present a case study of a software project at a Norwegian engineering and construction company in their effort to move towards a user-centred development approach that leverages on continuous delivery principles. We investigate how user representatives in form of super users have been involved in the process and their role in forming and implementing new digital technology in practice. We conclude that utilising super users have been instrumental to design a system that meet users’ needs. Providing opportunities to test the system in a production environment gave rise to new ideas on how to further refine the design. Involving super users also facilitated system adoption among workers. This is a post-peer-review, pre-copyedit version of an article. The final authenticated version is available online at: http://dx.doi.org/10.1007/978-3-030-64266-2_9

International audience; Book Front Matter of LNCS 12481

Part 3: Workshop on Handling Security, Usability, User Experience and Reliability in User-Centered Development Processes; International audience; Most phishing sites are simply copies of real sites with slight features distorted or in some cases masqueraded. This property of phishing sites has made them difficult for humans and various anti-phishing techniques to detect. Also, the attacker community has proved itself able to quickly adapt to anti-phishing measures, mainly warning messages to help limit the effectiveness of phishing attacks and protect unsuspecting users. Despite the notable advances made in the last years by the active warning messages for phishing, this attack remains one of the most effective. In this paper we propose an intelligent warning message mechanism, that might limit the effectiveness of phishing attacks and that might increase the user awareness about related risks. It implements an intelligent behavior that, besides warning the users that a phishing attack is occurring, explains why the specific suspect site can be fraudulent.

Part 4: Poster and Demos; International audience; Augmented Reality (AR) and Virtual Reality (VR) are technologies on the rise and as their market grows, speeding up the process of developing new ideas becomes even more important. In achieving rapid development, rapid prototyping plays a very important role. To support rapid prototyping, this demo paper presents an approach that relies on an object repository. It enables scanning, editing, storing and publishing of virtual objects that can be reused in different augmented and virtual reality applications. To show the benefits of the approach, an exemplary scenario is illustrated by prototyping an interior design application.

Part 3: Workshop on Handling Security, Usability, User Experience and Reliability in User-Centered Development Processes; International audience; Selecting a well performing agile software development team to develop a particular software is a complex issue for public authorities. This selection is often based on the estimated total cost of the project in an official request for proposals. In this paper we describe an alternative approach where three performance factors and the estimated cost were assessed and weighted to find the best agile team for a particular project. Five agile software development teams that fulfilled predefined technical requirements were invited to take part in one day workshops. The public authority involved wanted to assess both how each team performed during the workshops and the quality of the deliverables they handed in. The three performance factors were: (1) team collaboration and user experience focus, (2) user stories delivery and (3) the quality of the code. We describe the process of assessing the three performance factors during and after the workshops and the results of the assessments. The team that focused on one user story during the workshop and emphasized the three different quality factors, user experience, accessibility and security, got the highest rating from the assessment and were selected for the project. We also describe the lessons learned after concluding the assessment.

Part 2: User Experiences and Wellbeing at Work (UX@Work); International audience; With the development of new technologies and methodologies, multiple sectors start to experience the benefits and drawbacks. Currently, the industry is facing a new revolution known as Industry 4.0. This new path al-lowed all enterprises to further develop their methodologies and understand the disadvantages and advantages of it. With the sole purpose of retaining costs in production while maintaining the same degree of quality, companies desire to diminish their downtime due to malfunction or improper maintenance schedules that may not amount to the desired efficiency. Nevertheless, not all companies manage to enter this exclusive circle, since such technologies also deliver a high cost which some companies simply cannot support. Consequently, this generates a huge drawback to the outsiders of this revolution.

Part 2: User Experiences and Wellbeing at Work (UX@Work); International audience; This research paper presents the design process of creating a user persona of Indian mothers of preterm neonates. Many of these preterm neonates require hospitalization in Neonatal Intensive Care Units (NICUs), leading to mental stress for mothers and their families. The main objective of mother’s persona is to understand the mother behavior and preferences for designing app for these mothers. The mother’s persona is proposed based on hypothesis, user interviews and data analysis. The result shows that the participant mothers of preterm neonates are graduates and homemakers from semi-urban areas around Pune, India. These mothers prefer non-vegetarian diet, they visit a pediatrician more frequently and presently. Moreover, the mothers have challenges with care and anxieties related to their neonates. They do not use any mobile healthcare app or YouTube videos for information about neonatal care. In the future, a mobile app will be developed for these mothers with due consideration to their user persona.

Part 3: Software Development Strategies; International audience; Architectural Design Decisions (ADDs) capture the essence of relevant Architectural Knowledge (AK) and the underpinning rationale in order to produce well-designed software architectures. AK and design rationale might get lost if not captured at the same time when the architecture is discussed and modeled in early design phases. For years, this relevant knowledge has been captured using text templates and supported by a number of research tools. Nevertheless, as no commercial tool is still available combining AK capturing with UML notations to facilitate capturing the design decisions at the same time the architecture is modeled, is the major barrier to convince software architects and companies to invest in documenting the significant design decisions. As capturing AK using text templates requires an extra effort, we propose an approach to make the documentation process easier and reduce the effort thereof by using voice commands. In particular, we suggest an approach to: (i) capture ADDs using voice commands during design conversations, and (ii) link the captured ADDs to UML notations. Our approach integrates OctoUML, a modeling tool with voice commands for capturing design decisions by voice.

Part 4: Poster and Demos; International audience; Manual assembly in high variety - low volume production is challenging for the operators as there might be small changes from one product to the next. The operators receive adapted instruction sets to be aware of these small differences, currently either printed or presented on a computer terminal. Augmented Reality (AR) is considered the future of work instruction display as it promises hands-free interaction, but interacting with AR interfaces can be problematic in production environments.In this paper, we report on an exploratory study where we compare tablet interaction with three different ways of touch interaction for AR glasses: on the table, on the glasses, and the lower arm. While keeping the instructions the same in all conditions, we measured how placement affects the overall workload while performing an assembly task. Results indicate that combining additional wearable touch input with AR glasses is at least a promising direction for future research and, at best, an enabler for more widespread AR usage in manual assembly.

Part 7: Personalization and Recommender Systems; International audience; During cooperative interaction, participants introduce materials, artefacts, and other individuals into the ongoing interaction. Depending on how this introduction unfolds, the participants may embrace the new element in an easy way or not. If the new element is a collaborative application of interactive software designed to support the interaction, it may or may not improve the collaboration because of how it was introduced. Therefore, understanding and designing the initial interaction is key for unleashing the positive impact of collaborative systems. The literature has identified the fact that humans employ a specific range of behaviors when introducing an element into an ongoing interaction. Those introduction rituals are determined by whether the new element is a human or a material artefact. Introduction rituals involving interactive elements are still underexplored: How do participants introduce and initiate interaction with them? This manuscript explores the introduction behaviors emerging when an augmented-reality collaborative application is being introduced into a financial advisory service. It shows that the participants employ a wider range of introduction rituals during the introduction of this application than they do when they introduce a brochure. Notably, many of the observed behaviors resemble familiar opening rituals typically used when introducing and greeting humans. This supports the computers-are-social-actors argument and provides evidence that introducing a collaborative application has a social rather than a material character.

Part 9: Design Principles for Safety/Critical Systems; International audience; Driving is a sensitive task that is strongly affected by the driver’s emotions. Negative emotions, such as anger, can evidently lead to more driving errors. In this work, we introduce a concept of detecting and influencing driver emotions using psycho-physiological sensing for emotion classification and ambient light for feedback. We detect arousal and valence of emotional responses from wearable bio-electric sensors, namely brain-computer interfaces and heart rate sensors. We evaluated our concept in a static driving simulator with a fully equipped car with 12 participants. Before the rides, we elicit negative emotions and evaluate driving performance and physiological data while driving under stressful conditions. We use three ambient lighting conditions (no light, blue, orange). Using a subject-dependent random forests classifier with 40 features collected from physiological data we achieve an average accuracy of $78.9$% for classifying valence and $68.7$% for arousal. Driving performance was enhanced in conditions where ambient lighting was introduced. Both blue and orange light helped drivers to improve lane keeping. We discuss insights from our study and provide design recommendations for designing emotion sensing and feedback systems in the car.

Part 9: Interaction Design for Culture and Development I; International audience; More people are traveling than ever before. This intense and disproportionate growth in tourism may, however, generate negative environmental and social effects, especially on islands. In order to address this issue, this article presents the design and evaluation of Há-Vita, an interactive web platform, whose goal is to foster awareness of local nature and folk knowledge and create connections between locals and visitors. We explored these design goals through different research methods, such as user studies with tourists in hotel lobbies, as well as focus groups consisting of two different groups of local residents and a group of visitors. Theoretically, Há-Vita is grounded in the concept of “community-based tourism ventures,” which is concerned with environmental preservation via ecotourism practices and, at the same time, the empowerment of local communities. Furthermore, the design rationale of the platform is also inspired by the authenticity theory, which examines tourists’ pursuit of meaningful interactions with locals. Our results indicate that, despite time constraints (for visitors), locals and visitors were willing to interact with each other as they acknowledged authentic benefits in such interaction. Furthermore, our focus groups with locals have shown the potential to stimulate different levels of local empowerment based on the community-based tourism framework in the design iterations of Há-Vita.

Part 4: Assistive Technology for Visually Impaired; International audience; We present a design of an indoor orientation terminal for visually impaired older adults. Interaction is based on buttons, tactile symbols, and audio feedback. The terminal consists of five parts dedicated to a particular function. The tactile symbols mimic real-world objects. We performed three design iterations and conduct evaluations with a total of 17 participants, their mean age was 84.2 years. The results show that usage of real-world objects and low level of symbol abstraction leads to an unambiguous pairing of user expectations and real functions. Introduction of complicated and abstract artifacts like contour objects or complex tactile map was very hard to understand and recognize. Our final design was well accepted by all participants and allowed the participants to orient themselves in the indoor environment.

Part 1: User Modelling and User Studies; International audience; Cognitive functioning that affects user behaviors is an important factor to consider when designing interactive systems for the elderly, including emerging voice-based dialogue systems such as smart speakers and voice assistants. Previous studies have investigated the interaction behaviors of dementia patients with voice-based dialogue systems, but the extent to which age-related cognitive decline in the non-demented elderly influences the user experiences of modern voice-based dialogue systems remains uninvestigated. In this work, we conducted an empirical study in which 40 healthy elderly participants performed tasks on a voice-based dialogue system. Analysis showed that cognitive scores assessed by neuropsychological tests were significantly related to vocal characteristics, such as pauses and hesitations, as well as to behavioral differences in error-handing situations, such as when the system failed to recognize the user’s intent. On the basis of the results, we discuss design implications towards the tailored design of voice-based dialogue systems for ordinary older adults with age-related cognitive decline.

Part 8: Demonstrations and Installations; International audience; Mobile devices are the core computing platform we use in our everyday life to communicate with friends, watch movies, or read books. For people with severe physical disabilities, such as tetraplegics, who cannot use their hands to operate such devices, these devices are barely usable. Tackling this challenge, we propose SwipeBuddy, a teleoperated robot allowing for touch interaction with a smartphone, tablet, or ebook-reader. The mobile device is mounted on top of the robot and can be teleoperated by a user through head motions and gestures controlling a stylus simulating touch input. Further, the user can control the position and orientation of the mobile device. We demonstrate the SwipeBuddy robot device and its different interaction capabilities.

Part 2: User Experiences and Wellbeing at Work (UX@Work); International audience; The comfort of living for an average individual plays a crucial factor in urban development. It validates a city’s ability to provide all the necessary comfort for modern livability standards. To analyze city livability, in this position paper we have proposed a system that provides a lifestyle overview through locality Indexing of a particular geographical area according to the ease of living for four particular age groups like a child, middle-aged, senior adult, and senior citizen. The system accounts for various indicators like health, transport, population, climate, pollution, crowd, etc. to yield a personalized result. The system consists of a web interface and a python backend which pulls desired data about the location from sources like Google Maps (Places API) and data.gov.in. (Indian Govt. website). This data is then mined and useful/relevant information is summarized to yield an end result. Parallel computations consisting of pattern discovery (by mining algorithms) and data aggregation are carried on a cloud service maintaining a local data store for processed queries. The generated end result is then presented to the user in the form of visualization charts.

Part 8: Design Methods; International audience; In a user-centered design process, graphical user interface (GUI) prototypes may be seen as an important early artifact to design and validate user requirements before making strong commitments with a full-fledged version of the user interface. Ensuring the consistency of GUI prototypes with other representations of the user requirements is then a critical aspect of the design process. This paper presents an approach which extends Behavior-Driven Development (BDD) by employing an ontology in order to provide automated assessment for GUI prototypes as design artifacts. The approach has been evaluated by exploiting user requirements described by a group of experts in the flight tickets e-commerce domain. Such requirements gave rise to a set of User Stories that have been used to automatically check the consistency of Balsamiq prototypes which were reengineered from an existing web system for booking business trips. The results have shown our approach was able to identify different types of inconsistencies in the set of analyzed artifacts, allowing to build an effective correspondence between user requirements and their representation in GUI prototypes.

Part 3: Workshop on Handling Security, Usability, User Experience and Reliability in User-Centered Development Processes; International audience; Academic research and existing implementations of various systems and services identify instances of conflict between security and usability. Engineering the right trade-offs between security and usability is often not an easy task. Engineering of such trade-offs is mainly reliant on developers’ skills, who are either experts in security or usability. This research aims to assist the developers in engineering the right trade-offs by proposing the use of patterns. Patterns provide benefits like means of common vocabulary, shared documentation, reuse, among others. The use of patterns can assist security and usability developers by influencing their decision-making abilities when dealing with conflicts in other but similar context of use. For the identification of such patterns, the paper presents a three-stage methodology. To instantiate the methodology, a case study was conducted whose results are also presented in the paper.

Part 2: User Experience; International audience; Driver state detection is an emerging topic for automotive user interfaces. Motivated by the trend of self-tracking, one crucial question within this field is how or whether detected states should be displayed. In this work we investigate the impact of demographics and personality traits on the user experience of driver state visualizations. 328 participants experienced three concepts visualizing their current state in a publicly installed driving simulator. Driver age, experience, and personality traits were shown to have impact on visualization preferences. While a continuous display was generally preferred, older respondents and drivers with little experience favored a system with less visual elements. Extroverted participants were more open towards interventions. Our findings lead us to believe that, while users are generally open to driver state detection, its visualization should be adapted to age, driving experience, and personality. This work is meant to support professionals and researchers designing affective in-car information systems.

Part 6: Mobile HCI; International audience; Large displays on smartphones accommodate tasks needing more screen real-estate, but at the expense of limiting the use of one-handed operations. In this paper we explore thumb reachability on an articulated dual-display smartphone. While mobile devices are featuring dual screens, no previous work has explored how each physical display’s positions impact one-handed reach and interaction. We explore 32 inter-display configurations resulting from the combination of orientations of the two displays along two axes. In a preliminary study we explore how users grasp such dual-display configurations. We then conduct a study to investigate the effects of the relative position of two displays on thumb reachability. Results provide a range of dual-display configurations that are ideal for one-handed use, enabling knowledge on how apps for such emerging devices can be optimized for thumb input.

International audience; Assessing human bodies’ postures and positions enables to design new interaction techniques, to understand users’ performances and to evaluate ergonomics of devices. In addition to the applications for improving Human-Computer Interaction, human movement analysis is at the heart of other types of usages including sports, rehabilitation, gesture recognition, etc. This workshop aims at providing a platform for researchers and designers to discuss the challenges related to the processing (e.g., data collection, treatment, interpretation, recognition) of human movement (e.g., motor skills, amplitude of movements, limitations). We expect to identify the main challenges to be addressed and come up with a research agenda to give HCI new perspectives and suggest promising directions.

Part 10: Interactive Posters; International audience; Mobile and wearable interfaces have long been developed to improve mental health issues, including anxiety disorders, which represent a significant public health problem affecting more than 250 million people. However, most of the current approaches still operate in the so-called “reflective mind”, which hampers results since reflecting on your own health data can induce even more stress and anxiety. In this poster we introduce an alternative approach towards mitigating anxiety symptoms through the use of “subtle” wearable interfaces. Capitalizing on the subconscious processes of the mind is particularly attractive for anxiety disorders. We present a smart wearable in the form of a scarf that implements a subconscious, less-invasive approach in the design of assistive technologies for mental health. Preliminary results bring important implications for interaction design: combining psychological conditioning therapy (via a mobile app) with our smart scarf provides a solution that can be worn anytime anywhere to fight anxiety symptoms. But this work also raises many privacy and ethical concerns which should be discussed by the HCI community: how can designers balance the opaqueness of subconscious approaches with the necessary ethical transparency? And how can mental health technologies be conceived in such a way they do not instigate societal stigma in users?

Part 9: Industry Case Studies; International audience; Statistical analysis is gradually entering all areas of society, be in academia or in the private sector. Statistical software is used by statisticians but also by non-experts (medical doctors, psychologists...). Unfortunately, this kind of software is integrated into obsolete interfaces that completely ignore the principles of HCI and are poorly adapted to non-expert users.R++ project aims to develop a modern statistical analysis software program integrated into a user-friendly interface. In this paper, we present the methodology that led us to the design of R++. We also give two examples that this methodology allowed us to achieve.

Part 3: Interaction in Public Spaces; International audience; When traveling, a very common issue is to ask for the help of a stranger to take a photo on a touristic spot. Indeed, often the results of this short collaboration are not as previously imagined. In this paper, we introduce the concept of instant rephotography, a technique based on a simple and intuitive user interface, and in an efficient and low cost algorithm that finds the matching between two images. The user interface guides the photographer to position the camera in the right place that was once imagined by the camera owner, automatically taking the new photo. To correctly choose the new photo, we propose an algorithm based on ORB (Oriented FAST and Rotated BRIEF) feature points acquired from the reference and current photos, and on inertial sensors embedded in the photo device, a smartphone. To validate the concepts introduced, we implemented an Android App called Smart-Tourist Camera, conceived to help tourists to take good pictures during travels. Three different user studies involving 124 volunteers were conducted and results have shown that the photographs taken with the application are perceived as better than otherwise, and that users would use the App during their travels.

Part 1: User Modelling and User Studies; International audience; It is usually taken for granted that Direct Manipulation is the best interaction style for inexperienced or non-expert users; moreover, this style of interaction is generally considered the best for almost every situation and user. The recent shifts in technology that we all are currently experiencing have given rise to a great deal of new kinds of users performing specific tasks in a variety of scenarios. In this paper, we focus on users who access a system occasionally, infrequently, or in an unplanned way; i.e., users who do not want or cannot afford a learning curve. We show that for them, Direct Manipulation is not always the most suitable style of interaction. We assess the advantages of guiding this kind of users, in particular through the guided interaction framework known as Goal Driven Interaction. GDI can be viewed as a superset of wizards providing support far beyond a few steps through dialogs. Indeed, GDI is an interaction style with characteristics of its own. We report a complete user test that backs up previous hypotheses. The analysis of empirical data proves that GDI is more time-efficient than DM, requiring fewer moderator assistances for the users. Post-test questionnaires confirmed that participants had a strong preference for GDI.

Part 1: Interaction Design for Culture and Development II; International audience; Many studies investigating the use of mobile banking in developing countries focus on specific user groups (i.e., illiterates, low- and semi-literates, the unbanked, and/or poor, rural and underserved communities). Therefore, existing literature fails to provide understandings about mobile banking use in the developing world from a general perspective.In this paper, we report on a study conducted in Mali to understand the use of a mobile banking service. In total, 77 people coming from different neighborhoods of Bamako and exercising a large spectrum of jobs participated in the study. The paper sheds light on the use of mobile phone and mobile banking in Mali; suggests additional features, particularly related to communication, for the mobile banking service; and discusses findings that are of relevance for Human-Computer Interaction for Development (HCI4D) in general.

Part 2: Assistive Technology for Cognition and NeuroDevelopment Disorders; International audience; Children with Autism Spectrum Disorders (ASD) have difficulties with social communication and interaction. Social Stories$^\mathrm{TM}$ are a well-known intervention to help them overcome these difficulties. During these interventions, practitioners must check children’s understanding of various concepts that are taught. However, this activity - comprehension checking - is often skipped as practitioners find it difficult and time consuming. Our project explores how a technology-based tool (the S$^{2}$C$^{2}$ app) can be designed and developed to support Social Story$^\mathrm{TM}$ comprehension checking in children with ASD (aged 7–12) by involving typically developing children (TD) and experts in ASD and HCI. An initial pilot evaluation with sixteen TD children and five experts in ASD and HCI suggested that the S$^{2}$C$^{2}$ app provides appropriate engaging activities for children and facilitates Social Story$^\mathrm{TM}$ comprehension checking. However, caution must be taken in extending the results and more studies involving children with ASD are planned to be conducted in the future.

Part 10: Interactive Posters; International audience; Digital technologies are moving towards the human body. Designing for the body is commonly dubbed as body-centric computing (BCC) and includes two sides: (1) the neuro-science side; (2) the technical side mainly focuses on establishing and enabling the interactions. A conceptual framework enabling the systematic design and development of body-centric applications is introduced. Its novelty and importance are assessed within a set of application scenarios.

Part 10: Interactive Posters; International audience; Industry 4.0 (I4.0) has brought many changes in the way workers operate on and interact with smarter industrial machinery and spaces. New Human-Machine Interaction (HMI) solutions are required as the workers’ demands in the factory are still evolving. This paper introduces the development of a generic model-driven HMI solution that consists of a framework providing an API and widgets that can be (re)used to create the final interfaces for HMI across different I4.0 scenarios. The generic model takes into account the most important aspects of the shop floor context. As a first phase of evaluation, this solution is being tested in a prototype for a real use case, responding to the needs of an industrial partner. The paper ends by presenting this prototype to show the potential of the presented solution.

Part 10: Interactive Posters; International audience; This paper examines a novel approach to the problem of bullying by employing Child-Robot Interaction to attempt to understand the causes of perpetrators behaviour. A comparative study was undertaken to understand the efficacy of such an approach. Children aged 9–10 years were first identified on the basis of their bullying perpetration record and characteristics. Half the children were made to interact individually with a social robot and the other half with a human agent over the span of 3 weeks. Our results exhibit that while children opened up to both kinds of agents, interaction with the human agent led to more insightful conversations that enhanced understanding of causes for the perpetrator’s behaviour. As expected, the interactions varied from child to child and are to be considered on an individual basis. This is an ongoing study and shall be later extended to employ a hybrid of a within-subject and an in-between subject approach in order to examine the experience of each child individually and holistically.