publications([{ "lang": "en", "type_publi": "icolcomlec", "doi": "https://doi.org/10.1145/3772318.3791213", "title": "Visualization of Tracking Uncertainty in AR-based Surgical Guidance", "url": "https://hal.science/hal-05539752", "abstract": "Uncertainty caused by instrument tracking errors affects critical tasks such as surgery assisted by Augmented Reality (AR) guidance. This work investigates whether visualizing such uncertainty can improve task performance, trust, and confidence. We present four visualization techniques: Cone, Circle, Gauge, and Color. A two-part study evaluated these techniques on a surgical drilling task, first with 24 non-professional participants and then with 4 professional surgeons. Results indicate that uncertainty visualization improved drilling accuracy by 24% but increased task time by 76%. It also enhanced user confidence and trust in the system, with Cone and Circle as the most preferred visualizations. Based on our findings, we discuss design recommendations for integrating uncertainty visualization into AR-based surgical systems. This work paves the way for a higher success rate in surgical procedures.", "authors": { "1": { "first_name": "Chaymae", "last_name": "Acherki" }, "2": { "first_name": "Laurence", "last_name": "Nigay" }, "3": { "first_name": "Quentin", "last_name": "Roy" }, "4": { "first_name": "Thibault", "last_name": "Salque" } }, "year": 2026, "uri": "http://iihm.imag.fr/publication/ANR+26a/", "id": 1009, "bibtype": "inproceedings", "abbr": "ANR+26a", "address": "Barcelona (SPAIN), Spain", "date": "2026-04-13", "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet", "booktitle": "CHI 2026: CHI Conference on Human Factors in Computing Systems" }, { "lang": "en", "type_publi": "icolcomlec", "doi": "https://doi.org/10.1145/3772318.3790663", "title": "Swarm UIs: Impact of Assistance on Users' Sense of Agency", "url": "https://hal.science/hal-05527406", "abstract": "Swarm UIs provide assistance to support users in their tasks and are increasingly explored in HCI. This paper studies the extent to which this assistance impacts users' sense of agency. A reduced sense of agency can lead to non-use of the interface or a diminishing sense of responsibility regarding the consequences of users' actions. We conduct three experiments studying the impact of three factors on the sense of agency: the level of assistance, the task difficulty, and the predictability of modules. Our nine assistance levels vary in system autonomy and module coordination (proxy vs. no proxy). We find that higher assistance reduces users' sense of agency, and this effect is not impacted by task difficulty. Predictability only impacts the least assistive interaction techniques. Our results will foster users' acceptance, responsibility, and use of swarm UIs.", "authors": { "1": { "first_name": "Ophélie", "last_name": "Jobert" }, "2": { "first_name": "Amina", "last_name": "Korghlou" }, "3": { "first_name": "Yelli", "last_name": "Coulibaly" }, "4": { "first_name": "Thibaut", "last_name": "Leone" }, "5": { "first_name": "Alix", "last_name": "Goguey" }, "6": { "first_name": "Bruno", "last_name": "Berberian" }, "7": { "first_name": "Julien", "last_name": "Bourgeois" }, "8": { "first_name": "Céline", "last_name": "Coutrix" } }, "year": 2026, "uri": "http://iihm.imag.fr/publication/JKC+26a/", "id": 1010, "bibtype": "inproceedings", "abbr": "JKC+26a", "address": "Barcelona, Spain", "date": "2026-04-13", "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet", "booktitle": "2026 CHI Conference on Human Factors in Computing Systems (CHI '26)" }, { "lang": "en", "type_publi": "icolcomlec", "doi": "https://doi.org/2603.08107", "title": "''I don't want to break it'': An Exploration of Perceived Fragility in Shape-Changing Interfaces", "url": "https://hal.science/hal-05527386", "abstract": "Shape-Changing Interfaces (SCIs) dynamically alter their form, an inherent characteristic that introduces fragility into their design. As a result, users' perceptions of an interface's fragility or its potential to move or break may influence their interaction, however the extent of this effect is unclear. To address this gap, we conducted a qualitative study (N = 18) using video stimuli showcasing 20 existing SCIs. Through thematic analysis, we identified key factors impacting perceived fragility and formalized these into a framework. We then conducted a second study (N = 36) for which we fabricated SCIs that varied across selected fragility-related dimensions. We recorded user interactions and compared how the selected dimensions shaped manipulation of the objects and how they were considered by users. Together, these studies provide a structured foundational understanding of perceived fragility in SCIs and offer insights to enhance perceived robustness and inform future SCI development.", "authors": { "1": { "first_name": "Eva", "last_name": "Mackamul" }, "2": { "first_name": "Tom", "last_name": "Maillard" }, "3": { "first_name": "Noé", "last_name": "Marceaul" }, "4": { "first_name": "Yelli", "last_name": "Coulibaly" }, "5": { "first_name": "Julien", "last_name": "Pansiot" }, "6": { "first_name": "Laurence", "last_name": "Boissieux" }, "7": { "first_name": "Dominique", "last_name": "Vaufreydaz" }, "8": { "first_name": "Anne", "last_name": "Roudaut" }, "9": { "first_name": "Céline", "last_name": "Coutrix" } }, "year": 2026, "uri": "http://iihm.imag.fr/publication/MMM+26a/", "id": 1011, "bibtype": "inproceedings", "abbr": "MMM+26a", "address": "Barcelona, Spain", "date": "2026-04-13", "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet", "booktitle": "CHI Conference on Human Factors in Computing Systems" }, { "lang": "en", "type_publi": "icolcomlec", "doi": "https://doi.org/10.1145/3772318.3791042", "title": "D-MO: Depth from Motion and Occlusion as a Visual Channel for Information Visualization", "url": "https://iihm.imag.fr/blanch/projects/d-mo/", "abstract": "On a visualization, the position of the marks encoding data is the most expressive and effective visual channel. It conveys order and quantity without impairing the perception of other visual channels. In the field of Information Visualization, position is often restricted to two dimensions, because using the third dimension, depth, usually affects the perception of size, which is also one of the most effective visual channels. We propose a new visual channel, D-MO (Depth from Motion and Occlusion), a combination of visual cues, motion and occlusion, with interactions, that induces a depth perception suitable for combined use with classic visual channels. We characterize the expressiveness and effectiveness of D-MO and show that it is a magnitude channel with good accuracy, acceptable discriminability, and is separable from size. Thus, D-MO opens up new areas for visualization design, which is limited by the scarceness of available visual channels.", "authors": { "1": { "first_name": "Carla", "last_name": "Coutant" }, "2": { "first_name": "Adrien", "last_name": "Chaffangeon Caillet" }, "3": { "first_name": "Renaud", "last_name": "Blanch" } }, "year": 2026, "uri": "http://iihm.imag.fr/publication/CCB26a/", "pages": "18", "bibtype": "inproceedings", "id": 1012, "abbr": "CCB26a", "address": "Barcelona, Spain", "date": "2026-04-13", "document": "http://iihm.imag.fr/publs/2026/CHI2026-Coutant-D-MO.pdf", "type": "Conférences internationales de large diffusion avec comité de lecture sur texte complet", "booktitle": "Proceedings of the 2026 CHI Conference on Human Factors in Computing Systems (CHI ’26)" }]);