Adolescents estimate that they spend just under 5 hours online every day. This is almost as much time as they spend at school, with the average UK school day lasting 6.5 hours. Adolescent mental health has also declined substantially over the last decade, putting large-scale pressures on UK health services, society and the economy. This has made many concerned that digitalisation is actively damaging adolescent mental health. However, we still know relatively little about whether such concerns are warranted. This is a scientific supply issue highlighted by both the President of the Royal College of Psychiatrists ("We desperately need more research into the benefits and harms of technology use") and the UK Chief Medical Officers ("...more comprehensive research should be supported by health bodies and research institutions. An appropriate mechanism for measuring children's digital engagement needs to be developed..."). A lot of research on digitalisation and adolescent mental health has focused on social media, a particularly high-risk digital innovation. Social media is used heavily by the adolescent population (94% of 16-17s have a social media profile) and introduces changes to the social environment that could amplify pre-existing vulnerabilities. For example, peer rejection is especially salient in adolescence, and a mental health risk factor. Social media quantifies the social feedback adolescents receive from peers through 'like' counts, which could increase the salience of social feedback such as rejection, and therefore increase mental health risk (Mechanism A). Further social media allows for continued access to peers, which is very attractive to adolescents. This can lead to habitual social media use and self-control failures that impact mental health directly and indirectly (Mechanism B). Results of research examining the link between social media use and mental ill health have however been largely inconsistent, and consensus has not moved far beyond statements that the link is complicated. This has made it very challenging to design evidence-based recommendations and interventions to address the impacts of social media across society, policy and industry (e.g., the Online Safety Bill). My fellowship will address this issue by delivering a ground-breaking portfolio of basic and applied research. My team will take a novel mechanistic approach, investigating the mechanisms underlying the impact of social media on adolescent mental health (e.g., Mechanisms A and B, among others). We will first study these mechanisms of interest using observational data across three distinct levels of scientific explanation (experiential, algorithmic, and biological/cognitive). We will then systematically manipulate them in a longitudinal study, to test their mental health impact on an individual level. This will allow us to select two targets that will be developed and deployed in Years 5-7 of the fellowship in both policy and as an intervention that allows adolescents to experiment with changing their own social media use to improve their mental health. This research will be complemented by an agile pipeline of co-investigation and knowledge exchange with policymakers and stakeholders to address current questions in policy and practice, to ensure this investment is continuously creating positive impact for young people throughout the fellowship. This will be supported by an internship scheme that recruits talented undergraduate students from backgrounds underrepresented in academic research to assist my team and policy partners on select summer project 'sprints'. In depth co-creation with young people and parents will further tailor research outputs and dissemination throughout the fellowship. The evidence provided by my fellowship will therefore feed into crucial national decisions about childhood and digitalisation that will shape the lives of our children today and adults tomorrow, for decades to come.

Promoting improved understanding of how children's daily lives are influenced by the digital world that now surrounds them and how they experience family, peer and school life as a result represents a substantial challenge and opportunity relative to facilitating positive mental health and development for children and young people. Historically, researchers have emphasised the role of supportive parenting and positive school experiences (including peer relationships) as primary social environmental influences on children's mental health, with most interventions targeting family and school-based influences aimed at remediating poor mental health outcomes for children and young people. It is increasingly recognised that the digital environment constitutes a new dimension or common denominator to these traditional agencies of socialisation influence on children's mental health. Yet, little progress has been made in equipping parents, teachers and the professional agencies that work with families and schools with new knowledge that harnesses potential strengths while offering protection from substantial risks posed to children by the digital world. How do we equip parents, teachers, practitioners, policy makers and youth themselves with information, support and resources that promotes positive mental health in a contemporary (and future) digital age? Addressing this core challenge represents the primary objective of our multi-disciplinary e-Nurture network. While significant advances have been made in relation to highlighting and understanding the genetic and biological underpinnings of poor mental health and mental health disorders in recent years, it is recognised that the social environments children experience and interact with remain a substantial influence on their positive and negative mental health trajectories (even when genetic factors are considered). Three primary areas of social environmental influence on children's mental health have dominated past research and practice in this area. First, family socialisation processes, specifically parenting practices are recognised as a substantive influence on children's mental health. Second, peer influences are noted as an important influence on children's mental health. Third, school-based factors are recognised as a further influence on children's mental health and development. Increasingly, the digital environment is recognised as a factor that both infuses traditional agencies of socialisation for children and that can influence children directly. Policy makers have recently directed significant attention to the prevalence rates and support needs among children and young people who experience mental health problems. The digital environment and its potential for positive and negative influences on children's well-being, mental health and development has also received substantial research, policy and media attention. Building on this policy platform, the primary objectives of our network are to (1) explore how the digital environment has changed the ways in which children experience and interact with family, school and peer-based influences and what these changes mean for children's mental health, (2) identify how we can recognise and disentangle digital risks from opportunities when working with families, schools and professional agencies in developing intervention programmes to improve mental health outcomes for children and young people, and (3) identify how we effectively incorporate and disseminate this new knowledge to engage present and future practice models and the design and development of digital platforms and interventions aimed at promoting mental health and reducing negative mental health trajectories for young people. The network will engage a collaborative, cross sectoral approach to facilitating impacts by directly engaging academic, charity, industry, policy and front-line beneficiaries (e.g. families, parents, schools, teachers, children and young people).

The uneven ways that civil liberties, work, labour and health have all been impacted over the last 18 months as we have all turned to digital technologies to sustain previous ways of life, has not only shown us the extent of inequalities across all societies as they are cut through with gender, ethnicity, age, opportunities, class, geolocation; it has also led many organisations and businesses across all three sectors to question those values they previously supported. Capitalising on this moment of reflection across industry, the public and third sectors; we explore the possibility of imagining and building a future that takes different core values and practices as central, and works in very different ways. As the roles of organisations and businesses across all industry, the public and third sectors changes, what is now taken up as core values and ethos will be crucial in defining the future. INCLUDE+ will build a knowledge community around in/equalities in digital society that will comprise industry, academia, the public and third sectors. Responding to the Equitable Digital Society theme, we ask how we can design, co-create and realise digital services and infrastructures to support inclusion and equality in ways that enable all people to thrive. Focusing on the three connected strands of wellbeing, precarity, and civic culture; we address structural inequalities as they emerge through our research, investigating them through whole system approaches that includes the generation of outputs that comprise of new systems, services and practices to be taken up by organisations. More than this, our knowledge community will be underpinned by empirical, co-curation and participatory led research that will produce real interventions into those structural inequalities. These interventions will be taken up by organisations, responded to and considered, enabling the wider knowledge community to critically assess them in relation to the values they purport to promote. Fed by secondments and supported through smaller exploratory and escalator funds, our knowledge community will not only grow through traditional networking activities such as workshops, annual conferences, academic outputs and further funding; it will also grow through the development of interdisciplinary methods, knowledge exchange practices, and mentorship, which the secondment package will promote. In so doing, we structure our N+ around participatory research practices, people development and knowledge exchange, aiming to grow our network through the development and growth of people and good practice. INCLUDE+ is led by a highly experienced cross-disciplinary team incorporating Management and Business Studies, Computing, Social Sciences, Media and Communication and Legal Studies. Each Investigator brings vibrant international networks; active research projects feeding the Network+; and long experience of impact generation across policy and research. With support from organisations like the International Labour Organisation, Law Commission, Cabinet Office, and Equality and Human Rights Commission as well as the existing DE community, we will develop from and with existing research, extend this work and impact beyond it. Our partner organisations cut across industry, the public and third sectors and include (for example) Lego; NHS AI Lab; Space2; mHabitat; Leeds, Cambridgeshire and Swansea Councils; PeopleDotCom; Ditchley; 5Rights; EAMA; DataKind and IBM. We have designed the Network+ to enable a whole system approach that is genuinely exciting and innovative not just because of scalability, transference and scope, but also because of the commitment to people development, knowledge exchange and interdisciplinary practice that will also shape future research

Promoting improved understanding of how children's daily lives are influenced by the digital world that now surrounds them and how they experience family, peer and school life as a result represents a substantial challenge and opportunity relative to facilitating positive mental health and development for children and young people. Historically, researchers have emphasised the role of supportive parenting and positive school experiences (including peer relationships) as primary social environmental influences on children's mental health, with most interventions targeting family and school-based influences aimed at remediating poor mental health outcomes for children and young people. It is increasingly recognised that the digital environment constitutes a new dimension or common denominator to these traditional agencies of socialisation influence on children's mental health. Yet, little progress has been made in equipping parents, teachers and the professional agencies that work with families and schools with new knowledge that harnesses potential strengths while offering protection from substantial risks posed to children by the digital world. How do we equip parents, teachers, practitioners, policy makers and youth themselves with information, support and resources that promotes positive mental health in a contemporary (and future) digital age? Addressing this core challenge represents the primary objective of our multi-disciplinary e-Nurture network. While significant advances have been made in relation to highlighting and understanding the genetic and biological underpinnings of poor mental health and mental health disorders in recent years, it is recognised that the social environments children experience and interact with remain a substantial influence on their positive and negative mental health trajectories (even when genetic factors are considered). Three primary areas of social environmental influence on children's mental health have dominated past research and practice in this area. First, family socialisation processes, specifically parenting practices are recognised as a substantive influence on children's mental health. Second, peer influences are noted as an important influence on children's mental health. Third, school-based factors are recognised as a further influence on children's mental health and development. Increasingly, the digital environment is recognised as a factor that both infuses traditional agencies of socialisation for children and that can influence children directly. Policy makers have recently directed significant attention to the prevalence rates and support needs among children and young people who experience mental health problems. The digital environment and its potential for positive and negative influences on children's well-being, mental health and development has also received substantial research, policy and media attention. Building on this policy platform, the primary objectives of our network are to (1) explore how the digital environment has changed the ways in which children experience and interact with family, school and peer-based influences and what these changes mean for children's mental health, (2) identify how we can recognise and disentangle digital risks from opportunities when working with families, schools and professional agencies in developing intervention programmes to improve mental health outcomes for children and young people, and (3) identify how we effectively incorporate and disseminate this new knowledge to engage present and future practice models and the design and development of digital platforms and interventions aimed at promoting mental health and reducing negative mental health trajectories for young people. The network will engage a collaborative, cross sectoral approach to facilitating impacts by directly engaging academic, charity, industry, policy and front-line beneficiaries (e.g. families, parents, schools, teachers, children and young people).

The Horizon institute is a multidisciplinary centre of excellence for Digital Economy (DE) research. The core mission of Horizon has been to balance the opportunities arising from the capture, analysis and use of personal data with an awareness and understanding of human and social values. The focus on personal data in a wide range of contexts has required the development of a broad set of multidisciplinary competencies allowing us to build links from foundational algorithms and system to issues of society and policy. We follow a user-centred approach, undertaking research in the wild based on principles of open innovation. Horizon now encompasses over 50 researchers, spanning Computing, Engineering, Law, Psychology, Social Sciences, Business and the Humanities. It has grown a diverse network of over 200 external partners who are involved in ongoing collaborative research and impact with Horizon, ranging from major international corporations to SMEs, from a wide variety of sectors, alongside government and civil society groups. We have also established a CDT in the third wave of funding that will eventually deliver 150 PhDs. Our critical mass of researchers, partners, students and funding has already led to over 800 peer-reviewed publications, composed of: 277 journal articles, 51 books and book chapters, and 424 conference papers, in a total of 15 different disciplines. Over the years Horizon's focus has evolved from an emphasis on the collection and understanding of personal data to consider the user-centred design and development of data-driven products. This proposal builds on our established interdisciplinary competencies to deliver research and impact to ensure that future data-driven products can be both co-created and trusted by consumers. Core to our current vision is the idea that future products will be hybrids of both the digital and the physical. Physical products are increasingly augmented with digital capabilities, from data footprints that capture their provenance to software that enables them to adapt their behaviour. Conversely, digital products are ultimately physically experienced by people in some real-world context and increasingly adapt to both. This real-world context is social; hence the data is social and often implicates groups, not just individuals. We foresee that this blending of physical and digital will drive the merging of traditional goods, services and experiences into new forms of product. We also foresee that - just as today's social media services are co-created by consumers who provide content and data - so will be these new data-driven products. At the same time, we are also witnessing a crisis of trust concerning the commercial use of personal data that threatens to undermine this vision of data-driven products. Hence, it is vitally important to build trust with consumers and operate within an increasingly complex regulatory environment from the earliest stages of innovating future products. Our user-centred approach involves external partners and the public in "research-in-the-wild", grounding our fundamental research in real world challenges. Our delivery programme combines a bottom-up approach in which researchers are given the opportunity (and provided with the skills) to follow new impact opportunities in collaboration with partners as they arise (our Agile programme), with a top-down approach that strategically coordinates how these activities are targeted at wider communities (our Campaigns programme, with successive focus on Consumables, Co-production and Welfare), and reflective processes that allow us to draw out broader conclusions for the widest possible impact (our Cross-Cutting programme). Throughout we aim to continue to develop the capacity in our researchers, the wider DE research community and more broadly within society, to engage in responsible innovation using personal data within the Digital Economy.