Publications

Posterior Cortical Atrophy is a rare but significant form of dementia which affects people's visual ability before their memory. This is often misdiagnosed as an eyesight rather than brain sight problem. This paper aims to address the frequent, initial misdiagnosis of this disease as a vision problem through the use of an intelligent, cost-effective, wearable system, alongside diagnosis of the more typical Alzheimer's Disease. We propose low-level features constructed from the IMU data gathered from 35 participants, while they performed a stair climbing and descending task in a real-world simulated environment. We demonstrate that with these features the machine learning models predict dementia with 87.02% accuracy. Furthermore, we investigate how system parameters, such as number of sensors, affect the prediction accuracy. This lays the groundwork for a simple clinical test to enable detection of dementia which can be carried out in the wild.

Shape changing materials create a unique opportunity to design reconfigurable tactile display actuators. In this paper, we present a method that transforms a single thin monolithic sheet of Nitinol into a passive reconfigurable tactile pixel array at Braille resolution. We have designed a 27x27 tactile pixel array in which each pixel can be selectively actuated with an external source of heat. The pixels rise 0.4mm vertically with a peak blocked force of 0.28kg and have an average blocked force of 0.23kg at room temperature. After cooling, the pixels can be mechanically reconfigured back to their flat state for repeatable actuation. We demonstrate this actuator’s interactive capabilities through a novel erasable tactile drawing interface.

T. Bhatnagar, N. Marquardt, M. Miodownik and C. Holloway, "Transforming a Monolithic Sheet of Nitinol into a Passive Reconfigurable Tactile Pixel Array Display at Braille Resolution," 2021 IEEE World Haptics Conference (WHC), 2021, pp. 409-414, doi: 10.1109/WHC49131.2021.9517239.

Most research which investigates stigma towards with people with disabilities and the use of Assistive Technology (AT) are based in the Global North and focus on the experiences of people with disabilities and the consequences that stigma has on choices surrounding AT. However, stigma is a societal construct rooted in the attitude and beliefs that people without disabilities hold on disability and AT. Furthermore, the portrayal of people with disabilities and AT is dependent on the social context. In this paper, we examine how young Kenyans without disabilities view people with disabilities and AT users. Findings show that while the portrayal of disability is often shaped by negative emotion, participants felt that many of the barriers affecting people with disabilities were created by society. Perceptions of AT differed –devices were not only seen as a mark of disability but also as a sign of access to resources. Therefore, what we see is an emergent picture where social barriers can be reinforced by poverty, and where poverty reinforces social barriers faced by people with disabilities. We conclude that access to appropriate technology alongside societal interventions tackling incorrect beliefs about disability can help to overcome the stigma faced by people with disabilities.

Giulia Barbareschi, Norah Shitawa Kopi, Ben Oldfrey, and Catherine Holloway. 2021. What difference does tech make? Conceptualizations of Disability and Assistive Technology among Kenyan Youth: Conceptualizations of Disability and AT. In The 23rd International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '21). Association for Computing Machinery, New York, NY, USA, Article 18, 1–13. DOI: https://doi.org/10.1145/3441852.3471226

Orientation and mobility (O&M) training provides essential skills and techniques for safe and independent mobility for blind and partially sighted (BPS) people. The demand for O&M training is increasing as the number of people living with vision impairment increases. Despite the growing portfolio of HCI research on assistive technologies (AT), few studies have examined the experiences of BPS people during O&M training, including the use of technology to aid O&M training. To address this gap, we conducted semi-structured interviews with 20 BPS people and 8 Mobility and Orientation Trainers (MOT). The interviews were thematically analysed and organised into four overarching themes discussing factors influencing the self-efficacy belief of BPS people: Tools and Strategies for O&M training, Technology Use in O&M Training, Changing Personal and Social Circumstances, and Social Influences. We further highlight opportunities for combinations of multimodal technologies to increase access to and effectiveness of O&M training.

The London 2012 Paralympic Games was called “the most successful Paralympic Games ever” (by the then-President of the IPC), and it saw more athletes from more countries than ever before compete and become global heroes for the first time in a redeveloped part of East London which also hosted “the most accessible Olympic Games ever” that summer. However, the model used to design and deliver disability inclusion for London 2012, and its legacy, has never been explicitly written up. This paper presents new primary evidence from first-hand research from those who were involved; retrospectively framing the London 2012 Disability Inclusion Model such that it might be usable and developed for other global disability challenges. We used an adapted Delphi methodology, through four rounds: beginning with an initial hypothesis and testing through semi-structured interviews with ten key players in the London 2012 disability inclusion approach. Using thematic analysis with consensus building surveys and workshops we came to a settled unanimous agreement on the 12-step London 2012 Disability Inclusion Model comprising three parts: (Get ready) community-led mission setting, (Get set) essential building blocks and (Go) enabling a culture of success. The model is presented here, alongside a narrative on its uniqueness and replicability to other major programs, as a public good. We welcome its active use, testing and adaption by others in service of disability innovation for a fairer world.

Victoria Austin, Kate Mattick, and Cathy Holloway. 2021. "“This Is the Story of Community Leadership with Political Backing. (PM1)” Critical Junctures in Paralympic Legacy: Framing the London 2012 Disability Inclusion Model for New Global Challenges" Sustainability 13, no. 16: 9253. https://doi.org/10.3390/su13169253

Globally persons with disabilities have lower employment rates compared to the general population due to systemic barriers particularly in the formal sector. In developing countries, 80 percent to 90 percent of people with disabilities of working age are unemployed. There has been limited research in low-income and middle-income countries focused on the barriers to access and retain formal employment for persons with disabilities. The aim of this paper, based on desk research, is to analyse the barriers to access and retain formal employment of persons with disabilities which are framed in three categories according to where the barriers primarily manifest: 1. In the workplace among employers and co-workers without disabilities, 2. Among persons with disabilities seeking or engaged in formal employment and 3. In the wider social, physical and policy environment. Although the study mainly focuses on Kenya and Bangladesh other countries’ literature on access to and retention of employment of persons with disabilities were reviewed where relevant. In the current context where the global pandemic is breaking barriers to remote working one part of the solution will be to empower persons with disabilities with appropriate access to Information and Communication Technology, assistive devices and services, digital skills, creating more accessible and inclusive digital platforms for persons with disabilities which also hold the potential to improve working conditions and productivity for the whole workforce as well as enhancing resilience to potential future shocks.

Jahan & Holloway, 2020, Barriers to Access and Retain Formal Employment for Persons with Disabilities in Bangladesh and Kenya, GDI Hub Working Paper Series Issue 01