Recovering a lost ability is rarely easy, but unlike strengthening a muscle, progress in smell training, repeated exposure to specific scents to support recovery or maintain function, is often invisible. For those undergoing Digital Smell Training (DST), data visualisations may be the only markers of change. But how can graphs and numbers sustain motivation over months of slow, unpredictable recovery? This pictorial adopts a Research through Design approach to explore how data visualisations might better support motivation, adherence, and long-term engagement in DST. We draw on a six-month in-home study with 18 participants with varying olfactory abilities using a technology probe. Following initial feedback, we ran a co-design workshop to understand participants’ visualisation needs. These insights informed eight design directions and three visualisation concepts, later evaluated in a focus group. We explore how visualisations help ‘flip perspectives’, from tracking outcomes to nurturing perseverance across the uncertain journey of smell rehabilitation.

Take a deep breath; what do you smell? While sight and hearing dominate our perceptions, the sense of smell is often overlooked, even undervalued. However, the importance of our sense of smell goes beyond detecting odours. It shapes our emotions, memories, behaviour, and quality of life. Recent advances in olfactory interfaces have sparked discussions about the future of smell in human-computer interaction. While efforts mainly focus on the realization of new olfactory interfaces, here we collectively explore alternative worlds centred around the sense of smell. First, we conducted a design futuring workshop involving individuals with varying smell capabilities and expertise to envision and discuss smell-centred futures. Then, through iterative reflection, we arrived at three smell worlds presented as narratives and visuals. From this conceptual work, we offer new perspectives and generative possibilities for design research that prioritizes our noses.

The sound produced when touching fabrics, like a blanket, often provides information regarding the fabric’s texture properties (e.g., its roughness). Fabric roughness is one of the most important aspects of assessing fabric tactile properties. Prior research has demonstrated that touch-related sounds can alter the perception of textures. However, understanding touch-related sound of digital fabric textures, and how they could convey affective responses remain a challenge. In this study, we mapped digital fabric textures using mid-air haptics stimuli and examined how auditory manipulation influences people’s roughness perception. Through qualitative interviews, participants detailed that while rubbing sounds smoothen fabric texture perception, pure tone sounds of 450Hz and 900Hz accent roughness perception. The rubbing sound of fabric evoked associations with soft-materials and led to more calming experiences. In addition, we discussed how haptic interaction can be extended to multisensory modes, revealing a new perspective of mapping multisensory experiences for digital fabrics.

Human perception of touch is a complex interplay of sensory inputs, extending beyond tactile stimuli to include visual and auditory cues. Yet, the potential of olfactory cues (e.g., scents) to enrich our understanding and experiences of digital touch remains largely unexplored. This paper explores the integration of scent with digital haptic feedback, specifically focusing on the perception of textiles using an ultrasonic mid-air haptic device. In an initial validation study, we identified scents associated with the tactile properties of roughness, smoothness, coldness, and warmth based on participant ratings (n = 31). In a subsequent immersive Virtual Reality (VR) experiment, we explored how these scents might affect perceptions of digital textiles presented using ultrasonic mid-air haptics (n = 32). Our results suggested that while scents did not affect the tactile properties of digital textiles, participants reported the sensations feeling more realistic and more arousing according to the scent delivered. This multimodal integration of scent with digital haptic stimuli can open up the creation of more immersive experiences and more in-depth understanding of digital material properties.

Commensality, the act of eating together, offers a rich multisensory and social experience that technology can enhance. Dining involves interactions with food, where smells, colors, sounds, and textures contribute to a multisensory experience. The table becomes a focal point for social interaction, with nonverbal cues and conversations being the indispensable ingredients of the commensal experience. The CoFI2024 workshop aims to stimulate discussion about how interactive technology can enrich dining experiences. The other aim is to build an interdisciplinary community related to commensality and human-food interaction, focusing on the role of multimodal interaction among commensal partners sharing food, being humans or artificial dining companions.

There is an increasing interest in combining interactive technology with food, leading to a new research area called human-food interaction. While food experiences are increasingly benefiting from interactive technology, for example in the form of food tracking apps, 3D-printed food and projections on dining tables, a more systematic advancement of the field is hindered because, so far, there is no comprehensive articulation of the grand challenges the field is facing. To further and consolidate conversations around this topic, we invited 21 HFI experts to a 5-day seminar. The goal was to review our own and prior work to identify the grand challenges in human-food interaction. The result is an articulation of 10 grand challenges in human-food interaction across 4 categories (technology, users, design and ethics). By presenting these grand challenges, we aim to help researchers move the human-food interaction research field forward.

The tactile experience of fabric is not only a sensory experience but also an affective one. Our choice of fabric products, like clothing, is often based on how they feel. Effectively communicating such experiences is crucial for designing tactile fabric experiences. However, there remains a lack of comprehensive understanding of the fabric tactile and affective experiences, preventing the development of tools to facilitate the communication of these experiences. In this paper, we examine the fabric experiences of 27 participants towards nine cotton samples. We combine qualitative and quantitative methods to create FabTouch, a novel tool to facilitate a dialogue in the design of fabric experiences. We found six phases of fabric touch experiences including fabric touch responses, sensory associations, and emotional responses. Initial feedback from designers suggested that FabTouch could enrich design processes both in practice and in education and can create inspiration for physical and digital design explorations.