We investigate whether nudges can serve as in-the-moment support for youth online safety through a qualitative Wizard-of-Oz study with 19 adolescents (ages 13–19) using a realistic social media simulation (“SocialSim”). Even before nudges were introduced, participants demonstrated safety competence by interpreting social cues and using protective strategies. When nudges appeared, teens responded differently depending on risk severity and context; they relied on nudge guidance in high-risk, ambiguous situations (e.g., exposure to explicit content), while preferring to exercise their own judgement in lower-risk scenarios (e.g., information requests). We found that nudges were most effective when framed as developmental teaching moments that increased risk awareness and offered actionable advice while preserving autonomy. Participants emphasized proportionality, personalization, and trustworthy risk detection, and cautioned against overly restrictive interventions. Using a Social Information Processing (SIP) framework, this work informs the design of in-the-moment supports that foster adolescents’ decision-making, resilience, and self-regulation online.

Although social media use is ubiquitous among adolescents, research often emphasizes benefits and risks without considering the design-based affordances that may influence these experiences. Affordances enable or constrain user behavior and thus provide a valuable lens for promoting positive online engagement. To this end, we developed an affordance-centered framework and systematically coded 66 empirical studies on U.S. adolescents published in the past decade to map how platform features relate to specific user activities, the affordances they instantiate, and associated benefits and risks. For instance, Discoverability affordance, driven by algorithmic recommendations, supported Cognitive engagement by facilitating learning while heightening exposure to misinformation. Visibility affordance enabled Identity exploration through ephemeral sharing, lowering performance anxiety but raising post-disclosure regret when content reached hostile viewers. By clarifying how specific affordances facilitate adolescent experiences, our work contributes a design-grounded framework for future research that advances both theoretical understanding and the development of youth-centered interventions.

On social media, teens must manage their interpersonal boundaries not only with other people, but also with the algorithms embedded in these platforms.In this context, we engaged seven teens in an Asynchronous Remote Community (ARC) as part of a multi-year Youth Advisory Board (YAB) to discuss how they navigate, cope, and co-design for improved boundary management.Teens had preconceived notions of different platforms and navigated boundaries based on specific goals; yet, they struggled when platforms lacked the granular controls needed to meet their needs.Teens enjoyed the personalization afforded by algorithms, but they felt violated when algorithms pushed unwanted content.Teens designed features for enhanced control over their discoverability and for real-time risk detection to avoid boundary turbulence.We provide design guidelines for improved social media boundary management for youth and pinpoint educational opportunities to enhance teens' understanding and use of social media privacy settings and algorithms.

Academic research is largely an adult endeavor that creates systemic power imbalances when studying teen-centered topics, such as adolescent online safety. To rectify this problem, we engaged seven teens as co-researchers through a year-and-a-half-long Youth Advisory Board (YAB) program to critically assess our research processes, lead online safety solutions, and to reflect on their experiences participating in a YAB. Teens pushed back on standard research practices such as parental consent, sought decision-making power in study documentation, design, and execution, and gave more meaningful feedback on research protocols when more deeply involved in the research. For safety interventions, teens proposed both incremental changes for social media platforms (e.g., advanced privacy settings) and more disruptive changes (e.g., decentralized social media platforms) that enhance individual control, digital resilience, and equity. For the YAB, teens highlighted challenges, such as losing momentum over time, lack of collaborative opportunities, and competing interests, fueling frustrations and rifts in engagement. Our research underscores the value of involving teens as co-partners in shaping online safety research. Finally, we provide design implications for social media safety interventions that strengthen teens' agency and actionable guidelines for developing future long-term programs to ensure meaningful contributions to online safety research.

Youth online safety research in HCI has historically centered on perspectives from the Global North, often overlooking the unique particularities and cultural contexts of regions in the Global South. This paper presents a systematic review of 66 youth online safety studies published between 2014 and 2024, specifically focusing on regions in the Global South. Our findings reveal a concentrated research focus in Asian countries and predominance of quantitative methods. We also found limited research on marginalized youth populations and a primary focus on risks related to cyberbullying. Our analysis underscores the critical role of cultural factors in shaping online safety, highlighting the need for educational approaches that integrate social dynamics and awareness. We propose methodological recommendations and a future research agenda that encourages the adoption of situated, culturally sensitive methodologies and youth-centered approaches to researching youth online safety regions in the Global South. This paper advocates for greater inclusivity in youth online safety research, emphasizing the importance of addressing varied sociocultural contexts to better understand and meet the online safety needs of youth in the Global South.

HCI research has been at the forefront of designing interventions for protecting teens online; yet, how can we test and evaluate these solutions without endangering the youth we aim to protect? Towards this goal, we conducted focus groups with 20 teens to inform the design of a social media simulation platform and study for evaluating online safety nudges co-designed with teens. Participants evaluated risk scenarios, personas, platform features, and our research design to provide insight regarding the ecological validity of these artifacts. Teens expected risk scenarios to be subtle and tricky, while also higher in risk to be believable. The teens iterated on the nudges to prioritize risk prevention without reducing autonomy, risk coping, and community accountability. For the simulation, teens recommended using transparency with some deceit to balance realism and respect for participants. Our meta-level research provides a teen-centered action plan to evaluate online safety interventions safely and effectively.

We conducted a study with 173 adolescents (ages 13-21), who self-reported their offline and online risk experiences and uploaded their Instagram data to our study website to flag private conversations as unsafe. Risk profiles were first created based on the survey data and then compared with the risk-flagged social media data. Five risk profiles emerged: Low Risks (51% of the participants), Medium Risks (29%), Increased Sexting (8%), Increased Self-Harm (8%), and High Risk Perpetration (4%). Overall, the profiles correlated well with the social media data with the highest level of risk occurring in the three smallest profiles. Youth who experienced increased sexting and self-harm frequently reported engaging in unsafe sexual conversations. Meanwhile, high risk perpetration was characterized by increased violence, threats, and sales/promotion of illegal activities. A key insight from our study was that offline risk behavior sometimes manifested differently in online contexts (i.e., offline self-harm as risky online sexual interactions). Our findings highlight the need for targeted risk prevention strategies for youth online safety.

This research examines how caseworkers collaborate with foster families to address adolescent online safety. We interviewed 32 caseworkers who worked with teens (ages 13-17) in foster care within the past 5 years. Using thematic analysis, we found that case managers are most concerned about sexual-related risks that result in physical abuse (e.g., sex trafficking) or online interactions that facilitated offline risks (e.g., runaway, illegal drug activity), rather than risks that only manifested in virtual spaces. Yet, inadequate training and insufficient support left caseworkers at a loss for how to address these challenges on top of their already heavy caseloads, often making online safety an afterthought. We call on the foster care system to place a higher priority in providing collaborative and socio-technical ecological support for caseworkers, foster parents, and children, so that early risk prevention in online spaces can support the safety and well-being of foster youth offline.

With the prevalence of risks encountered by youth online, strength-based approaches such as nudges have been recommended as potential solutions to guide teens toward safer decisions. However, most nudging interventions to date have not been designed to cater to teens' unique needs and online safety concerns. To address this gap, this study provided a comprehensive view of adolescents' feedback on online safety nudges to inform the design of more effective online safety interventions. We conducted 12 semi-structured interviews and 3 focus group sessions with 21 teens (13 - 17 years old) via Zoom to get their feedback on three types of nudge designs from two opposing perspectives (i.e., risk victim and perpetrator) and for two different online risks (i.e., Information Breaches and Cyberbullying). Based on the teens' responses, they expressed a desire that nudges need to move beyond solely warning the user to providing a clear and effective action to take in response to the risk. They also identified key differences that affect the perception of nudges in effectively addressing an online risk, they include age, risk medium, risk awareness, and perceived risk severity. Finally, the teens identified several challenges with nudges such as them being easy to ignore, disruptive, untimely, and possibly escalating the risk. To address these, teens recommended clearer and contextualized warnings, risk prevention, and nudge personalization as solutions to ensure effective nudging. Overall, we recommend online safety nudges be designed for victim guidance while providing autonomy to control their experiences, and to ensure accountability and prevention of risk perpetrators to restrict them from causing harm.

There is growing concern regarding adolescent online risks posed by social media. Prior work calls for a paradigm shift from restrictive approaches towards strength-based solutions to online safety, that provide autonomy and control to teens. To better understand how we might design online safety interventions that help teens deal with online risks, we must include teens as partners in the design and evaluation of online safety solutions. To address this gap, my first dissertation study focused on co-designing online safety features with teens, which showed that teens often design real-time interventions that resemble "nudges". Therefore, my dissertation focuses on evaluating the effectiveness of these nudge designs in an ecologically valid social media simulation. To do this, I will conduct three studies: 1) a User Experience Bootcamp with teens to teach them design skills for co-designing online safety features, 2) a focus group study to design an ecologically valid social media simulation, 3) a between-subjects experiment within a social media simulation for evaluating the effect of nudges in educating teens and helping them make safer choices when exposed to risk. My goal for this research is to understand, design, develop, and evaluate online safety nudges that can help promote self-regulated, autonomous, and safer interactions for teens online.

Adolescent online safety researchers have emphasized the importance of moving beyond restrictive and privacy invasive approaches to online safety, towards resilience-based approaches for empowering teens to deal with online risks independently. Unfortunately, many of the existing online safety interventions are focused on parental mediation and not contextualized to teens' personal experiences online; thus, they do not effectively cater to the unique needs of teens. To better understand how we might design online safety interventions that help teens deal with online risks, as well as when and how to intervene, we must include teens as partners in the design process and equip them with the skills needed to contribute equally to the design process. As such, we conducted User Experience (UX) bootcamps with 21 teens (ages 13-17) to first teach them important UX design skills using industry standard tools, so they could create storyboards for unsafe online interactions commonly experienced by teens and high-fidelity, interactive prototypes for dealing with these situations. Based on their storyboards, teens often encountered information breaches and sexual risks with strangers, as well as cyberbullying from acquaintances or friends. While teens often blocked or reported strangers, they struggled with responding to risks from friends or acquaintances, seeking advice from others on the best action to take. Importantly, teens did not find any of the existing ways for responding to these risks to be effective in keeping them safe. When asked to create their own design-based interventions, teens frequently envisioned "nudges" that occurred in real-time. Interestingly, teens more often designed for risk prevention (rather than risk coping) by focusing on nudging the risk perpetrator (rather than the victim) to rethink their actions, block harmful actions from occurring, or penalizing perpetrators for inappropriate behavior to prevent it from happening again in the future. Teens also designed personalized sensitivity filters to provide teens the ability to manage content they wanted to see online. Some teens also designed personalized nudges, so that teens could receive intelligent, guided advice from the platform that would help them know how to handle online risks themselves without intervention from their parents. Our findings highlight how teens want to address online risks "at the root" by putting the onus of risk prevention on those who perpetrate them - rather than on the victim. Our work is the first to leverage co-design with teens to develop novel online safety interventions that advocate for a paradigm shift from youth risk protection to promoting good digital citizenship.

The methods in which we study the online experiences of adolescents should be evidence-based and informed by youth. This is especially true when studying sensitive topics, such as the online risk behaviors of minors. We directly engaged 20 adolescents (ages 12-18) in the co-design of two different research methodologies (i.e., diary studies and analyzing social media trace data) for conducting adolescent online safety research. We also interviewed 13 of their parents to understand their perspectives. Overall, teens wanted to share their personal experiences and benefit society, while parents wanted researchers to tackle a topic that they felt was a prevalent problem for teens. Yet, they both had significant concerns regarding data privacy of the sensitive disclosures made by teens during such studies. Teens' feared getting in trouble. Participants emphasized the importance of developing a trusting relationship with the researcher to overcome these concerns. Participants also saw the potential for using the research study as a tool for risk-reporting and mitigation, where researchers could act as liaisons between the teens and other parties (e.g., counselors, law enforcement, parents) to share pertinent risk details and facilitate resources or even help teens directly by giving them strategies for mitigating online risks they encountered during the study. Our research delves into important ethical considerations for conducting risk-focused research with adolescents and uncovers the critical need for designing risk-based research for youth protection. We provide researchers with heuristic guidelines for conducting ethical research with vulnerable populations (i.e., adolescents) and keeping participants safe while doing so.