Learning to play music is an embodied process, but traditional tools like scores and recordings overlook the role of gesture. While video tutorials offer visual cues, they remain detached from the instrument. We present ReTouche, an interactive system that projects synchronized notes and hand gestures directly onto the actuated keys of a player piano. The system includes a pipeline for adapting publicly available overhead-view YouTube videos and supports interactions for video-based learning, such as sectional practice, layered guidance, and self-recording. We evaluate ReTouche through a comparative structured observation study with YouTube-based self-learning (n=18), a two-week autoethnography study (n=3), and a focus group with professional piano teachers (n=4). Our findings show that embodied representations can ground self-guided piano learning by anchoring gesture, sound, and action within the instrument. Learners appropriated these representations to develop strategies and sustain motivation, while teachers saw potential for integrating ReTouche as a complement to conventional pedagogy.

Large language models are increasingly used for both task-based assistance and social companionship, yet research has typically focused on one or the other. Drawing on a survey (N = 202) and 30 interviews with high-engagement ChatGPT and Replika users, we characterize digital companionship as an emerging form of human-AI relationship. With both systems, users were drawn to humanlike qualities, such as emotional resonance and personalized responses, and non-humanlike qualities, such as constant availability and inexhaustible tolerance. This led to fluid chatbot uses, such as Replika as a writing assistant and ChatGPT as an emotional confidant, despite their distinct branding. However, we observed challenging tensions in digital companionship dynamics: participants grappled with bounded personhood, forming deep attachments while denying chatbots “real” human qualities, and struggled to reconcile chatbot relationships with social norms. These dynamics raise questions for the design of digital companions and the rise of hybrid, general-purpose AI systems.

The experience of leaving North Korea and navigating life as an undocumented person in China presents significant challenges for those seeking refuge in South Korea. This paper presents findings from an eight-month longitudinal ethnographic study with five newly arrived North Korean defector women in their first year in South Korea. We closely examine how digital technologies are intertwined with their everyday adaptation: how newcomers engage with digital systems, what frictions emerge, and how past experiences of living invisibly shape these interactions. This study contributes to the HCI community by (1) offering an empirically grounded, underrepresented account of early-stage digital resettlement among North Korean defectors; (2) conceptualizing first-time digital identity as a site of acute vulnerability shaped by past experiences and long histories of marginalization; and (3) proposing temporal, context-sensitive, self-reliance–oriented approaches to digital adaptation that supports vulnerable newcomers’ sociotechnical transition into a new society.

North Korean defector mothers raising children in South Korea face challenges in balancing disclosure of their past with protecting their children from discrimination and stigma. Drawing on interviews with 22 North Korean defector mothers, we examine how children’s exposure to polarized media on North Korea acts as an unexpected, external force that shapes prejudice toward mothers’ backgrounds. This sociotechnical influence, combined with a lack of meaningful storytelling resources, complicates mothers’ disclosure decisions and constrains narrative agency over their own identities. We contribute to HCI by (1) advancing an empirically grounded understanding of how digital technologies mediate stigmatized identity disclosure in families, reshaping mother-child dynamics and mothers’ identity negotiations; (2) proposing design directions for storytelling technologies that support narrative agency, silence, and emotionally safe, anonymous sharing of disclosure strategies among mothers with stigmatized histories; (3) foregrounding the lived experiences and familial dynamics of a highly underrepresented population navigating digitally saturated ecosystems.

Decentralised social media (DSM) platforms such as Mastodon offer community-governed alternatives to corporate social networks but place substantial governance burdens on volunteer operators. As interest grows in applying artificial intelligence (AI) to support this work, little is known about whether DSM operators want AI, what roles they consider appropriate, and what governance boundaries they require. We conducted semi-structured interviews with 20 operators across Mastodon, Pixelfed, PeerTube, Lemmy, Pleroma, and Funkwhale, using generative feature probes and speculative scenarios to explore their perceptions of AI. Operators rejected AI as an autonomous actor, instead envisioning it as governance infrastructure that provides contextual intelligence, supports cross-instance coordination, and sustains community and moderator well-being. They also articulated strict boundaries rooted in DSM values, including human accountability, reversibility, transparency, community-centred configuration, and strong data-governance constraints. We contribute empirical insights and design implications for AI compatible with decentralised, federated social media.

As Human-Computer Interaction (HCI) researchers increasingly conduct studies involving populations with stigmatised identities, more researchers must focus on creating conversational spaces where participants feel comfortable discussing their experiences. This study unpacks how and why HCI researchers engage in self-disclosure to facilitate such spaces. We share eight autoethnographic personal stories of key moments when we disclosed or concealed personal information in our HCI studies with diverse participant groups (people with dementia, victims of online romance scams, children with autism, and North Korean defectors). Through analysing these stories, we found that these decisions were shaped by various goals: creating a welcoming environment, demonstrating credibility, establishing common ground, reducing stigma, and directing the interview’s focus. The acts of disclosure or concealment affected the interactions with participants, the collected data, and the well-being of the researcher and participant. We argue that greater awareness, reflection, guidance, and sharing are needed regarding self-disclosure in HCI research and offer a reflexive guide to help researchers prepare for and reflect on their self-disclosure practices. By making these practices visible and open to discussion, we aim to make researcher-participant interactions in sensitive settings more ethical, effective, and transparent. • HCI researchers dynamically disclose/conceal personal information with stigmatised groups. • Researchers differ in the who/what/when/why(not)/how of their self-disclosure. • HCI lacks awareness, guidelines, and transparency for researcher self-disclosure. • Reflexivity around self-disclosure is needed for ethical and effective research.

CHI ’25, Yokohama, Japan

Is 'art' simply 'content' in the age of social media? What does art's creation, appreciation, and experience lose when art becomes content? This exploratory research employs a mixed methods approach encompassing interviews, co-design, and stakeholder reviews to critically examine the perceptions of artists, curators, and content creators regarding the distinction between 'art' and 'content.' Our participants reveal four characteristics essential for art experiences that we use to co-design new digital 'content' environments. The work concludes with content creators reviewing the characteristics and designs, offering their thoughts on the feasibility and potential future for 'art' on social media. We offer open-source access to all design and research materials. By exploring the divide between 'art' and 'content,' this research contributes insights and guidelines for developing alternative algorithmic experiences to support creativity on social media.

In a world where digital technology is omnipresent, North Korea stands as an outlier, with most citizens uninformed about its existence. This study explores the experiences of North Korean defectors as they transition to a highly digitally connected society—South Korea. Through 21 semi-structured interviews, we initially investigate the critical needs and challenges they encounter during their transitions. Then, we examine the role of digital technology as they adapt to the highly connected digital environment of South Korea. Our findings highlight that social media serves as a double-edged sword, providing the freedom to construct a desired identity while accentuating the gap between their real and ideal selves. This empirical research offers insights into how an underrepresented population navigates the digital landscape during life transitions, shedding light on the drawbacks and ways to better address their needs.

Mental health problems are prevalent issues in modern society. While psychological counseling has been a traditional solution, it faces such barriers as negative societal perceptions and limited accessibility. To overcome these, researchers have explored remote counseling via video/voice calls. Despite its advantages of accessibility, convenience, and anonymity, the lack of personal interaction continues to be a drawback. This study investigates the feasibility of using an augmented reality (AR) mask in remote counseling and whether it could increase the level of self-disclosure-which is often used to measure the effectiveness of counseling-while maintaining anonymity. We conducted a controlled experiment and a qualitative user study to assess the effects of AR masks on counselees' level of self-disclosure during remote counseling. The results suggest that AR masks can increase this level more effectively for people with a low disposition for self-disclosure.