JaeWon Kim

Young people consistently say they want authentic self-expression, less judgment, and more interpersonal trust on social media, yet they rarely manage to engage that way. My dissertation argues that the obstacle is normative rather than individual: how youth engage is governed less by personal choice than by platform norms, peer perception, and beliefs about how others behave. I take a social norms approach to youth social media design organized around three claims. First, platform norms constrain individual behavior, producing a pluralistic ignorance in which youth enact norms they privately reject. Second, design interventions are themselves shaped by existing norms, so whether a feature works depends on the environment around it, which means relational goals such as privacy must be treated as social norms rather than individual settings. Third, a societal norm about what "social media" is - equating it with a few mainstream platforms - confines policy and design to mitigating those platforms rather than actively envisioning supportive alternatives. Together these claims motivate my dissertation research: engaging youth directly in designing and building an evidence-based independent platform whose features consistently signal that building trusted connections is what the space is for.

People care about climate change, injustice, and humanitarian crises. The challenge is not apathy but capacity: sustained engagement with large-scale problems is psychologically costly, and social media architecture often amplifies awareness while providing few pathways to meaningful action. The result is rising distress, overwhelm, and disengagement - particularly among young people who encounter global suffering through platforms designed for attention capture rather than constructive response. This workshop examines how social technology design shapes the conditions for sustained engagement with societal challenges. Drawing on Tronto's care ethics framework and research in moral psychology and platform studies, we ask why caring at scale is difficult and how social media can both exacerbate and potentially mitigate this difficulty. Tronto's framework shows that good care requires more than awareness: it demands responsibility, competence, and community. Dominant social media architectures stall the caring process at its earliest phase. We invite researchers and designers to identify platform designs that deplete or support the capacity to care, and to develop design directions for sustainable care: engagement that people can maintain over time without burning out.

This dissertation develops a design framework for friendship-supportive youth social media. I conducted a qualitative meta-analysis across my formative, case-study, and co-design work with teens and young adults, synthesizing recurring design themes into three pillars: social understanding (legible norms, intentions, trust, reciprocity, and accountability), placeness (spatial and embodied affordances that make online interaction feel inhabitable), and identity alignment (authentic expression that remains current, plural, and interpretable). The framework is grounded in interpersonal, developmental, and sociotechnical theory, but its contribution is design-oriented: it translates broader accounts of friendship and social development into the specific ways social media platforms can shape youth friendship building. I initially validate parts of this framework through WhoamI Today (WIT), a platform deployed with 99 youth across the United States and Korea. My proposed work extends this validation through a follow-up deployment while refining the framework as a roadmap for cumulative design research on youth social media.

We present a design framework for friendship-supportive youth social media, derived from a synthesis of five empirical studies with 331 youth participants (ages 13-25) using interviews, co-design, surveys, diary studies, and a field deployment. Iterative analysis of 209 design-relevant data points identified three pillars: Social Understanding (interaction norms, interaction cues and scaffolding, social accountability and governance), Placeness (third place and community, boundaries and personal spaces, shared presence), and Identity Alignment (identity currency, identity plurality, relational identity signals). The framework maps nine design spaces through which platforms can support the conditions under which youth friendships form, deepen, and are maintained. It offers a shared vocabulary for locating contributions, comparing design interventions, and identifying under-explored areas for future work.

Children today encounter social issues - climate change, conflict, inequality - through digital technologies, and the design of that encounter shapes whether young people move toward lasting civic engagement or toward anxiety and withdrawal. Much of the content children see is optimized for attention through fear and urgency, with few pathways toward meaningful action - contributing to rising distress and disengagement among young people who care deeply but feel powerless to act. This full-day workshop introduces "sustainable care" as a design lens, asking how technology might support children's sustained engagement with social causes without contributing to empathic distress or burnout. We invite researchers and practitioners across child-computer interaction, games, education, and youth mental health to map this landscape together and develop a research agenda for the CCI community.

Social media is central to how young people maintain relationships, develop identity, and access communities, yet dominant platform designs often leave youth feeling disempowered rather than supported. My dissertation argues that youth social media design is shaped by three forms of problem-space misattunement. Conceptual misattunement occurs when the language of “social media” anchors participants to existing platforms' interaction templates. I address this through a Fictional Inquiry design workshop that frees youth from preconceived notions of social media by having them brainstorm ways to “magically connect with remote wizard friends” rather than ideas for “social media.” Definitional misattunement occurs when researchers define what “better” means on youth's behalf. I address this through a Discord-based asynchronous community that supports youth-led collective inquiry. Evaluative misattunement occurs when participants are asked to judge static or hypothetical designs. I address this through an ego-anchored, LLM-agent simulation sandbox. Together, these studies develop youth-grounded criteria and design directions for relationally supportive social media.

Drawing on observations from three prior studies with youth aged 13-24, we examine how metaphor shapes the way young people reason about privacy and imagine privacy designs beyond settings panels. Spatial metaphors made complex permission structures feel like movement through rooms and the placing of objects within them. Embodied metaphors gave youth language for shared norms around presence, access, and intrusion. Fantastical metaphors turned privacy work into something playful and discoverable, prompting more generative and granular design ideas. Relational metaphors, however, exposed the same mechanism's downside: when a system feels like a loyal companion while data passes through an institution, youth may disclose more than they otherwise would. This provocation does not argue that some metaphors are good and others bad. It argues that metaphors meaningfully scaffold both the design process and the user experience of usable privacy, and that choosing one is an ethical decision about which norms a privacy interface makes easy to see, imagine, and act on.

Women face significant challenges in seeking support for sexual and reproductive health (SRH) due to cultural taboos and microaggressions, even within supposedly safe online spaces. This study focuses on unmarried South Korean women who encounter these difficulties and often risk detrimental health outcomes by avoiding timely care. To investigate how to create safer and more supportive spaces for these women, we designed a 9-week study using the Asynchronous Remote Communities method for 26 unmarried Korean women participants. We created structured and unstructured activities to encourage sharing SRH narratives, which led to increased mutual support and understanding among participants. Additionally, we designed educational and reflective interventions that helped participants recognize the nuances and harms of microaggressions. This increased awareness promoted self-reflection and supportive actions among participants. Our approach demonstrates the potential to create supportive, reflective online spaces for people from marginalized communities who face stigmatized healthcare challenges. We hope our research inspires the development of more inclusive online spaces, driving positive social change in stigmatized healthcare support.

Design has the potential to cultivate hope in the face of complex societal challenges, especially those central to CSCW research. These challenges are often addressed through efforts aimed at harm reduction and prevention - essential but sometimes limiting approaches that can unintentionally narrow our collective sense of what is possible. This one-day, in-person workshop builds on the 1st Positech Workshop at CSCW 2024 by offering practical ways to move beyond reactive problem-solving toward building capacity for proactive goal setting and generating pathways forward. We explore how collaborative and reflective design methodologies can help research communities navigate uncertainty, expand possibilities, and foster meaningful change. By connecting design thinking with hope theory, which frames hope as the interplay of "goal-directed," "pathways," and "agentic" thinking, we will examine how researchers might chart new directions in the face of complexity and constraint. Through hands-on activities including problem reframing, building a shared taxonomy of design methods that align with hope theory, and reflecting on what it means to sustain hopeful research trajectories, participants will develop strategies to embed a deliberately hopeful approach into their research.

We introduce Needs-Conscious Design, a human-centered framework for AI-mediated communication that builds on the principles of Nonviolent Communication (NVC). We conducted an interview study with N=14 certified NVC trainers and a diary study and co-design with N=13 lay users of online communication technologies to understand how NVC might inform design that centers human relationships. We define three pillars of Needs-Conscious Design: Intentionality, Presence, and Receptiveness to Needs. Drawing on participant co-designs, we provide design concepts and illustrative examples for each of these pillars. We further describe a problematic emergent property of AI-mediated communication identified by participants, which we call Empathy Fog, and which is characterized by uncertainty over how much empathy, attention, and effort a user has actually invested via an AI-facilitated online interaction. Finally, because even well-intentioned designs may alter user behavior and process emotional data, we provide guiding questions for consentful Needs-Conscious Design, applying an affirmative consent framework used in social media contexts. Needs-Conscious Design offers a foundation for leveraging AI to facilitate human connection, rather than replacing or obscuring it.

Through a three-part co-design study involving 19 teens aged 13-18, we identify key barriers to effective boundary regulation on social media, including ambiguous audience expectations, social risks associated with oversharing, and the lack of design affordances that facilitate trust-building. Our findings reveal that while adolescents seek casual, frequent sharing to strengthen relationships, existing platform norms and designs often discourage such interactions, leading to withdrawal. To address these challenges, we introduce trust-enabled privacy as a design framework that recognizes trust, whether building or eroding, as central to boundary regulation. When trust is supported, boundary regulation becomes more adaptive and empowering; when it erodes, users default to self-censorship or withdrawal. We propose concrete design affordances, including guided disclosure, contextual audience segmentation, intentional engagement signaling, and trust-centered norms, to help platforms foster a more dynamic and nuanced privacy experience for teen social media users. By reframing privacy as a trust-driven process rather than a rigid control-based trade-off, this work provides empirical insights and actionable guidelines for designing social media environments that empower teens to manage their online presence while fostering meaningful social connections.

As artificial intelligence (AI) advances in reasoning capabilities, most recently with the emergence of Large Reasoning Models (LRMs), understanding how children conceptualize AI's reasoning processes becomes critical for fostering AI literacy. While one of the "Five Big Ideas" in AI education highlights reasoning algorithms as central to AI decision-making, less is known about children's mental models in this area. Through a two-phase approach, consisting of a co-design session with 8 children followed by a field study with 106 children (grades 3-8), we identified three models of AI reasoning: Deductive, Inductive, and Inherent. Our findings reveal that younger children (grades 3-5) often attribute AI's reasoning to inherent intelligence, while older children (grades 6-8) recognize AI as a pattern recognizer. We highlight three tensions that surfaced in children's understanding of AI reasoning and conclude with implications for scaffolding AI curricula and designing explainable AI tools.

Through co-design interviews (N=19) and a design evaluation survey (N=136) with U.S. teens ages 13-18, we investigated teens' privacy management on social media. Our study revealed that 28% of teens with public accounts and 15% with private accounts experience "dysfunctional fear," that is, fear that diminishes their quality of life or paralyzes them from taking necessary precautions. These fears fall into three categories: fear of uncontrolled audience reach, fear of online hostility, and fear of personal privacy missteps. While current approaches often emphasize individual vigilance and restrictive measures, our findings show this can paradoxically lead teens to either withdraw from beneficial social interactions or resign themselves to accept privacy violations, viewing them as inevitable. Drawing on teen input, we developed and evaluated ten design prototypes that emphasize empowerment over fear, system-wide explicit emphasis on privacy, clear privacy norms, and flexible controls. Survey results indicate teens perceive these approaches as effectively reducing privacy concerns while preserving social benefits. Our findings suggest that platforms will be more likely to protect teens' privacy and less likely to manufacture unnecessary fear if they include designs that minimize the impact on other users, have low trade-offs with existing features, require minimal user effort, and function independently of community behavior. Such designs include: 1) alerting users about potentially unintentional personal information disclosure and 2) following up on user reports.

Prior work has documented various ways that teens use social media to regulate their emotions. However, little is known about what these processes look like on a moment-by-moment basis. We conducted a diary study to investigate how teens (N=57, Mage=16.3 years) used Instagram to regulate their emotions. We identified three kinds of emotionally-salient drivers that brought teens to Instagram and two types of behaviors that impacted their emotional experiences on the platform. Teens described going to Instagram to escape, to engage, and to manage the demands of the platform. Once on Instagram, their primary behaviors consisted of mindless diversions and deliberate acts. Although teens reported many positive emotional responses, the variety, unpredictability, and habitual nature of their experiences revealed Instagram to be an unreliable tool for emotion regulation (ER). We present a model of teens' ER processes on Instagram and offer design considerations for supporting adolescent emotion regulation.

We investigate youth visions for ideal remote social interactions, drawing on co-design interviews with 23 participants (aged 15-24) experienced with 3D gaming environments. Using a Fictional Inquiry (FI) method set in the Harry Potter universe, this research reveals that young people desire social media that functions more like immersive, navigable shared social spaces. Across these interviews, participants identified six key priorities for meaningful social connection over social media: intuitive social navigation, shared collaborative experiences, communal environments fostering close relationships, flexible self-presentation, intentional engagement, and playful social mechanics. We introduce the spatial integrity framework, a set of four interrelated design principles: spatial presence, spatial composition, spatial configuration, and spatial depth. Together, these principles outline how online spaces can be designed to feel more like meaningful environments, spaces where relationships can grow through shared presence, movement, and intentional interaction. Participants also described the FI process itself as meaningful, not only for generating new ideas but for empowering them to imagine and shape the future of social media.

In light of the diminishing presence of physical third places - informal gathering spaces essential for social connection - this study explores how the social media platform Discord fosters third-place experiences. Drawing on Oldenburg's conceptual framework, we analyze how Discord's design elements support the creation of virtual third places that foster both dyadic and community-based relationships. Through 25 semi-structured interviews with active Discord users, we identified 21 design elements aligned with Oldenburg's third-place characteristics. These elements cluster around four core principles: providing themed spaces for repeated interactions, supporting user autonomy and customization, facilitating mutually engaging activities, and enabling casual, low-pressure interactions. This work contributes to understanding how intentional platform design can cultivate virtual spaces that support meaningful social connections. The findings have implications for designing future social technologies that can help address growing concerns about social isolation in an increasingly digital world.

Adolescents are particularly vulnerable to the pressures created by social media, such as heightened self-consciousness and the need for extensive self-presentation. In this study, we investigate how BeReal, a social media platform designed to counter some of these pressures, influences adolescents' self-presentation behaviors. We interviewed 29 users aged 13-18 to understand their experiences with BeReal. We found that BeReal's design focuses on spontaneous sharing, including randomly timed daily notifications and reciprocal posting, discourages staged posts, encourages careful curation of the audience, and reduces pressure on self-presentation. The space created by BeReal offers benefits such as validating an unfiltered life and reframing social comparison, but its approach to self-presentation is sometimes perceived as limited or unappealing and, at times, even toxic. Drawing on this empirical data, we propose design guidelines for platforms that support authentic self-presentation while fostering reciprocity and expanding beyond spontaneous photo-sharing. These guidelines aim to enable users to portray themselves more comprehensively and accurately, ultimately supporting teens' developmental needs, particularly in building authentic relationships.

Social technology research today largely focuses on mitigating the negative impacts of technology and, therefore, often misses the potential of technology to enhance human connections and well-being. However, we see a potential to shift towards a holistic view of social technology's impact on human flourishing. We introduce Positive Social Technology (Positech) , a framework that shifts emphasis toward leveraging social technologies to support and augment human flourishing. This workshop is organized around three themes relevant to Positech: 1) "Exploring Relevant and Adjacent Research" to define and widen the Positech scope with insights from related fields, 2) "Projecting the Landscape of Positech" for participants to outline the domain's key aspects and 3) "Envisioning the Future of Positech," anchored around strategic planning towards a sustainable research community. Ultimately, this workshop will serve as a platform to shift the narrative of social technology research towards a more positive, human-centric approach. It will foster research that goes beyond fixing technologies to protect humans from harm, to also pursue enriching human experiences and connections through technology.