Abstract This paper explores household preferences for visualizing consumption data and investigates the potential of data physicalizations to enhance user engagement and promote sustainable practices within households. We conducted semi-structured interviews with thirteen households, utilizing a combination of images and low-fidelity prototypes to gain insights into participants’ preferences, ideas and feedback on visualizing consumption information. We requested participants to discuss an object in their home that symbolizes sustainability. The results revealed different emotional responses, from empathy to repulsion, triggered by different visual representations. Our findings also identified certain physical objects and locations within the household that play a role in fostering family collaboration towards sustainable practices. Participants preferred having a physical representation of their consumption data within their homes over a screen-based display. In light of these findings, we open space to consider designing physicalizations that encourage collaboration, enhance user engagement and motivate households to reduce their consumption.

Most people with a visual impairment retain some residual vision, yet accessibility strategies and research for visual art focus on non-visual aids and strategies. Little is known about how image enhancements may benefit people with low vision in art settings. Our study explored the challenges of people with visual impairments in museums and art galleries and the potential of visual enhancements to improve accessibility. Through online focus groups with 18 participants, we uncovered multifaceted visual challenges. Participants emphasised the role of non-visual senses to reduce visual ambiguities. Subsequently, we presented participants with the concept of image enhancements on Head-Mounted Displays (HMDs) as a potential approach to enhance visual accessibility. Participants expressed nuanced perspectives, advocating for this technology to improve visual art. The findings provide valuable insights for enhancing the visual experience of people with low vision in museums and galleries through design.

Although household consumption contributes to climate change, it can be challenging to comprehend the consequences and effects from a personal perspective. In this paper, we explore the design of physical data visualisations to promote sustainable practices within households. We conducted 15 household design workshops involving household members to explore physical designs and envision the potential use of physical artefacts in the home to promote sustainability behaviours using five low to medium-fidelity prototypes. The findings from these workshops highlight the need to balance aesthetics, abstraction, and the presentation of actionable information in the design of physical artefacts. Based on our findings, we identify key design considerations for future design: (1) including all household members in the design process to reflect the collective goals and values of the home, fostering a sense of ownership and engagement, (2) considering child-friendly design in physical artefacts to promote awareness, education, engagement, and sustainable values in children, (3) and considering nature-based visuals to reduce the mental burden of information overload.

Understanding household practices, beliefs, relationships among the members, and their preferences are often overlooked in the design of home-based interventions aiming to reduce consumption. We conducted a survey in the United Kingdom (22 responses) and a follow-up interview with 13 households to inform the design of interventions for reducing household consumption by: 1) understanding household consumption practices, and 2) identifying the concerns and challenges for household engagement with sustainability practices. Our findings highlight how the perspectives, understanding, and motives for consumption reduction actively shape household practices and their attempts to curtail consumption. Existing non-negotiable practices led to additional household consumption and we found different strategies households use to reach a shared-decision on food and energy use. Based on our findings, we provide opportunities for motivating and fostering engagement with sustainable practices at home.

People with low vision experience reduced mobility that affects their physical and mental wellbeing. With augmented reality (AR) glasses, there are new opportunities to provide visual and auditory information that can improve mobility for this vulnerable group. Current research into AR-based mobility aids has focused mainly on the technical aspects, and less emphasis has been placed on understanding the usability and suitability of these aids in people with various levels of visual impairment. In this paper, we present the results of qualitative interviews with 18 participants using HoloLens v1 and eight prototype augmentations to understand how these enhancements are perceived by people with low vision and how these aids should be adjusted to suit their needs. Our results suggested that participants with moderate vision loss could potentially perceive the most benefit from glasses and underlined the importance of extensive customizability to accommodate the needs of a highly varied low vision population.

Besides the efforts of the Ecuadorian government in the last decade to improve the healthcare infrastructure, it still falls short to meet the healthcare needs of its population and remains far away from providing equal access to healthcare services. Based on a visit to an itinerant health point in a rural community and research conducted in public and private hospitals, this paper presents a number of infrastructural challenges that impact the everyday caring experiences of patients and healthcare professional's work practices. Reflecting on these challenges, we discuss some opportunities for future design of digital health tools and services in the Ecuadorian context.

As self-tracking has evolved from a niche movement to a mass-market phenomenon, it has become possible for people to track a broad range of activities and vital parameters over years, even decades. The associated opportunities, as well as the challenges, have had very little research attention so far. With the phenomenon of long-term tracking becoming widespread and important, we have identified its key characteristics by drawing on work from UbiComp, HCI, and health informatics. We identify important differences between long- and short-term tracking, and discuss consequences for the tracking process. Going beyond previous models for short-term tracking, we now present a model for long-term tracking, integrating its distinctive characteristics in purposeful and incidental tracking. Finally, we present major topics for future research.

This paper describes the design and implementation of a control-theoretic model that can be used to model both the discrete and continuous behavior of a human operator. The human operator model can be used to compare different device user interfaces in terms of human performance. The implemented human operator model combines an ON-OFF control model and a behavior-based hybrid automaton with three controllers. The controllers, defined as continuous, discrete, and fine-tuning behavior, simulate the user's conceptual model of the user interface. The device model used is that of a commercial syringe pump with chevron keys, described as a formal specification. Results of the human operator model simulation were generated for 20 different numbers obtained from syringe pump log files. The simulation results were compared over 33 trials to a lab study employing a device based on the formal specification. The result of the simulation shows a significant similarity to the result of the lab study for all the numbers used.

Many countries have an increasingly aging population. In recent years, mobile technologies have had a massive impact on social and working lives. As the size of the older user population rises, many people will want to continue professional, social and lifestyle usage of mobiles into 70s and beyond. Mobile technologies can lead to increased community involvement and personal independence. While mobile technologies can provide many opportunities, the aging process can interfere with their use. This workshop brings together researchers who are re-imagining common mobile interfaces so that they are more suited to use by older adults.

Although number entry appears to be a trivial task, user errors are still common and could be a result of poorly engineered interaction with the devices. We are challenging the design of universal number entry systems by looking at cases where user errors are frequently made. The telephone is used as a platform to compare input devices for number entry where we can look for speed and accuracy trade-offs between direct and indirect inputs. We will focus on the knob, button, and touchscreen and hope to find guidelines for when each is appropriate to use in a number entry system.

The aim of this workshop is to provide a focal point for research and technology dedicated to persuasion and influence on mobile platforms. We aspire to establish a scientific network and community dedicated to emerging technologies for persuasion using mobile devices. This workshop would be a unique opportunity for interaction designers and researchers in this area to share their latest research and technologies on 'nudge' methods with the scientific communities. Patterns of consumption such as drinking and smoking are shaped by the taken-for-granted practices of everyday life. However, these practices are not fixed and 'immensely malleable'. Consequently, it is important to understand how the habits of everyday life change and evolve. Our decisions are inevitably influenced by how the choices are presented. Therefore, it is legitimate to deliberately 'nudge' people's behaviour in order to improve their lives. Mobile devices can play a significant role in shaping normal practices in three distinct ways: (1) they facilitate the capture of information at the right time and place; (2) they provide non-invasive and cost effective methods for communicating personalised data that compare individual performance with relevant social group performance; and (3) social network sites running on the device facilitate communication of personalised data that relate to the participant's self-defined community. Among the issues the workshop will take on are:(a) What opportunities do mobile interventions provide? (b) How far the intervention should go? (c) Is persuasion ethical? and (d) How can we extend the scale of intervention in a society using mobile devices? Participants will contribute to the workshop with examples of nudge and persuasive technologies, and we will work together to create novel ideas, interactive applications on the phone, and discuss future opportunities.

In this article we describe a novel approach to pedestrian navigation using bearing-based haptic feedback. People are guided in the general direction of their destination via vibration, but additional exploratory navigation is stimulated by varying feedback based on the potential for taking alternative routes. We describe two mobile prototypes that were created to examine the possible benefits of the approach. The successful use of this exploratory navigation method is demonstrated in a realistic field trial, and we discuss the results and interesting participant behaviours that were recorded.

In this article we describe the Sweep-Shake system, a novel, low interaction cost approach to supporting the spontaneous discovery of geo-located information. By sweeping a mobile device around their environment, users browse for interesting information related to points of interest. We built a mobile haptic prototype which encourages the user to explore their surroundings to search for location information, helping them discover this by providing directional vibrotactile feedback. Once potential targets are selected, the interaction is extended to offer an hierarchy of information levels with a simple method for filtering and selecting desired types of data for each geo-tagged location. We describe and motivate our approach and present a short field trial to situate our design in a real environment, followed by a more detailed user study that compares it against an equivalent visual-based system.

People record and share their experiences through text, audio and video. Increasingly they do this blogging from mobile devices. We illustrate a novel, mobile, low interaction cost approach to supporting the creation of a rich record of journeys made and places encountered. By pointing and tilting a mobile, users indicate their interests in a location. No content is provided to the user in situ but, later, web materials including images, entries from other people's blogs and web pages are automatically placed on an interactive map for viewing on a larger screen device. We built two mobile prototypes to explore the approach -- one combines gestures and visual map feedback; the other is more lightweight, allowing the user to simply point-and-tilt. We describe and motivate the approaches and present user studies that raise issues relevant to their design and to the wider class of device and service concerned with mobile spatial information access.

This paper presents a dynamic system approach to the design of multimodal interactive systems. We use an example where we support human behavior in a browsing task, by adapting the dynamics of navigation using speed-dependent automatic zooming (SDAZ), allowing the user to switch smoothly among different modes of control. We show how the user’s intention is coupled to the browsing technique via the dynamic model, and how the sdaz method couples the document structure to audio samples using a model-based sonification. We demonstrate that this approach is well suited to mobile and wearable applications, and audio feedback provides valuable information, supporting intermittent interaction, i.e. allowing movement-based interaction techniques to continue while the user is simultaneously involved with real life tasks. Author Keywords Multimodality, speed-dependent automatic zooming, mode

We combine the functionality of a mobile Global Positioning System (GPS) with that of an MP3 player, implemented on a PocketPC, to produce a handheld system capable of guiding a user to their desired target location via continuously adapted music feedback. We illustrate how the approach to presentation of the audio display can benefit from insights from control theory, such as predictive 'browsing' elements to the display, and the appropriate representation of uncertainty or ambiguity in the display. The probabilistic interpretation of the navigation task can be generalised to other context-dependent mobile applications. This is the first example of a completely handheld location- aware music player. We discuss scenarios for use of such systems.