International audience

User experience is an important user interface quality factor that needs to be maintained during interaction. With this goal, we propose to adapt user interfaces to users' emotions. This requires being able to detect at runtime negative emotions to trigger adaptations. However, emotions depend on users' gender and age. This makes it difficult to identify negative emotions and their cause. This paper studies the categorization of emotions depending on users' age and gender and two user experience dimensions (aesthetics and usability). Thanks to an experiment, it proposes some emotions thresholds that can be used for detecting usability and aesthetics problems from users' age and gender. These results are used in a user interface adaptation system to infer negative emotions and user interface problems.

Computer scientists in information system encounter difficulties in leading research when they must consider human aspects, especially while designing users centred experiments. In order to guide them in this difficult task, this paper presents the THEDRE research process and the MATUI decision tree. It focuses on MATUI which aims at helping in the selection of the most appropriate user centred experimental methods thanks to researchers oriented criteria. MATUI also considers a categorisation and a description of experimental methods. THEDRE and MATUI are supported by a website to practically guide researchers. They are the results of 10 years of work in information system experiments. 16 researchers have evaluated them during 2 focus groups.

This paper proposes a formal model of learning games for teachers in higher education by involving them strongly in the design process. The evolution of the teaching profession was followed by the emergence of tools with interesting potential such as, in the field of TEL and in a non-exhaustive way: serious games, MOOC, ubiquitous TEL, and so on. But there is a lack of tools to facilitate their design and use by teachers, especially for learning games. Based on the researches around learning games models, we will specify the characteristics we use to define the DISC model. This model is composed of elements easily adaptable to artifacts facilitating the work of authors. It was tested for the creation of a learning game with a teacher who is teaching fluid mechanics.

This paper presents DOP8: a Data Mining Iterative Cycle that improves the classical data life cycle. While the latter only combines the data production and data analysis phases, DOP8 also integrates the analysis operators life cycle. In this cycle, data life cycle and operators life cycle processing meet in the data analysis step. This paper also presents a reification of DOP8 in a new computing platform: UnderTracks. The latter provides a flexibility on storing and sharing data, operators and analysis processes. Undertracks is compared with three types of platform 'Storage platform', 'Analysis platform' and 'Storage and Analysis platform'. Several real TEL analysis scenarios are present into the platform, (1) to test Undertracks flexibility on storing data and operators and (2) to test Undertracks flexibility on designing analysis processes.

Business Intelligence (BI) aims to support business users to make decisions by providing methods and tools to easily access and manage their information. Even if many organizations have employed BI applications, not all of them have been successful. Therefore, it is important to ensure that they fit business and users' needs in terms of information, knowledge and decision. In this paper, a proposal to apply BI for BI is elaborated. Analysing a BI system based on BI techniques is our main contribution and it is the core of our proposal. While involving users, our proposal aims to identify BI indicators and dimensions and to propose a system architecture allowing to analyse the current BI environment and make decisions about its use. A case study at STMicroelectronics has been conducted since it uses a BI system for making decisions.

Only intrusive and expensive ways of precisely expressing emotions has been proposed, which are not likely to appear soon in everyday Ubicomp environments. In this paper, we study to which extent we can identify the emotion a user is explicitly expressing through 2D and 3D gestures. Indeed users already often manipulate mobile devices with touch screen and accelerometers. We conducted a field study where we asked participants to explicitly express their emotion through gestures and to report their affective states. We contribute by (1) showing a high number of significant correlations in 3D motion descriptors of gestures and in the arousal dimension; (2) defining a space of affective gestures. We identify (3) groups of descriptors that structure the space and are related to arousal. Finally, we provide with (4) a preliminary model of arousal and we identify (5) interesting patterns in particular classes of gestures. Such results are useful for Ubicomp application designers in order to envision the use of gestures as a cheap and non-intrusive affective modality.

On September 19th 2011, Facebook introduced "Intelligent Lists" which are Friends Lists (FL) automatically created and pre-filled based on users' and their contacts' profiles information (education, work, city of living, kin, etc.). In early 2011, we conducted a study on contact management in Facebook in order to understand users' real needs. Outcomes from this study suggest several recommendations, some of which can be found today in the Facebook Intelligent Lists.

This paper reports on an empirical study performed to validate a theoretical model about the composition of smart artifacts by end-users. We have solicited 17 families and used a combination of interviews and a playful cultural probe. Results show that families are willing to couple smart objects to improve their lives, and that the theoretical questions raised by our model are sound. New services are more easily envisioned when coupling involves a "communicating" object or a "programmable" object. Being a communicating object has more impact than being programmable. Services envisioned by families included: Service substitution (e.g., replacing the user interface of the alarm clock with that of the time setting available on mobile phones); Service improvement (e.g., extending appliances such as the washing machine, by coupling them with the interaction resources of the TV set); Service chaining as ready for use "packages" to improve well-being for routine activities; along with Service "starters" as a means to control packages. Other findings are related to the playful cultural probe. Based on pictures of objects taken by the family members, our probe served as an ice-breaker; family members "revealed their house" naturally and the use of images of intimate objects increased interest and imagination.

This paper presents the design and evaluation of the Wavelet menu and its implementation on the iPhone. The Wavelet menu consists of a concentric hierarchical Marking menu using simple gestures. The novice mode, i.e. when the menu is displayed, is well adapted to the limited screen space of handheld devices because the representation of the menu hierarchy is inverted, the deeper submenu being always displayed at the center of the screen. The visual design is based on a stacking metaphor to reinforce the perception of the hierarchy and to help users to quickly understand how the technique works. The menu also supports submenu previsualization, a key property to navigate efficiently in a hierarchy of commands. The quantitative evaluation shows that the Wavelet menu provides an intuitive way for supporting efficient gesture-based navigation. The expert mode, i.e. gesture without waiting for the menu to pop-up, is another key property of the Wavelet menu: By providing stroke shortcuts, the Wavelet favors the selection of frequent commands in expert mode and makes eyes-free selection possible. A user experiment shows that participants are able to select commands, eyes-free, while walking.

This paper presents a qualitative evaluation of a method for building information systems engineering processes. It includes the description of the evaluated method, the profiles of the selected subjects and the set up protocol. We also describe the results that allowed us to improve the method.

International audience