Sleep is necessary for all aspects of health, yet up to half of teenagers globally do not get enough sleep, or sleep that is of sufficient quality. While evidence-based management strategies and treatments are available, access remains limited. There has been a proliferation in the development of digital tools and programs addressing adolescent sleep problems in recent years. This review provides a synthesis of the current literature on assessment, treatment, and digital interventions for adolescent sleep, outlining key challenges and areas for future research needed to advance this field of knowledge and practice.

As youth mental health concerns continue to increase, creative solutions must be developed to increase access to timely and effective care. Stepped-care models (SCMs) provide one innovative solution by offering patients initial access to low-intensity treatment options and "stepping-up" those who remain symptomatic. Most youth-focused SCMs have been developed for specific diagnoses, failing to account for the high comorbidities and undifferentiated symptom profiles common at this age. In response, transdiagnostic SCMs have emerged, focused on treating shared mechanisms of youth psychopathology through use of common evidence-based treatment elements. Although available studies are showing early promise, additional research is needed.

This article outlines a clinical staging model for obsessive-compulsive disorder (OCD), focusing on early detection and tailored interventions to reduce the disorder's substantial personal and societal impacts. It examines OCD's progression from initial symptoms to chronic illness, highlighting the impact of delayed treatment and the need for early, stage-specific care. The article presents a scalable treatment framework, from lifestyle modifications in early stages to advanced therapies for severe cases. This model aims to improve access to effective care, enhance adherence, and prevent chronicity, offering a more personalized approach to OCD management.

Mental health is a burden on society globally, particularly for young people, leading to unprecedented demands for mental health services. Organized sport programs provide a unique opportunity to reach young people "where they are" with mental health and well-being programs. This article reviews the relevant literature on interventions that target the promotion of mental health and well-being among youth in organized sports programs, research that incorporates strengths-based approaches in sports, and studies that are more comprehensive, which include screening and intervention that target physical well-being, personal attributes and character strengths, and mental health symptom management within youth sports programs.

The Parents under Pressure program was developed for families with parental substance misuse, mental health, intergenerational trauma, and significant financial and social disadvantage. In this article, we provide an overview of the program, and a description of the training and implementation support process we adopted for the field. Drawing from implementation science, we describe the implementation strategies and outcomes that inform this work. We conclude with a description of training events for practitioners in (i) Central Australia working with Aboriginal families and (ii) with mothers in residential mother and child facility in the Republic of Ireland.

Autism affects 2% to 3% of youth, approximately half of whom experience a co-occurring anxiety disorder. Left untreated, anxiety symptoms show a worsening trajectory into adulthood and increase the functional impact of the core autism symptoms. Innovative treatment approaches such as Internet-CBT adapted for autistic youth demonstrate preliminary effectiveness in symptom reduction while overcoming barriers and increasing accessibility. Insights and considerations regarding the development of the Learning to Understand and Navigate Anxiety for Adolescents (LUNA-Adolescent) program are presented as a promising approach to treatment for autistic adolescents and their families.

Pediatric obsessive-compulsive disorder significantly impacts the lives of children and families, with cognitive-behavioural therapy including exposure and response prevention (ERP) being the current recommended treatment. However, several barriers prevent children and families from receiving timely access to evidence-based care. Parent training in ERP, integrated into multi-technology programs, offers an innovative approach to maintain therapeutic support by training parents to implement ERP at home, overcoming delays to accessing care. These programs have demonstrated preliminarily effectiveness, acceptability, and feasibility, and provide families with treatment when and where they need it most.

The current article provides a brief overview of universal mental health screening in schools. We begin by presenting the available evidence for the effectiveness of school-based mental health screening. We then report on its acceptability among stakeholders with discussion of the barriers and logistical considerations required to successfully deliver screening in schools. Finally, we present a case example of the national student mental health check-in tool, My Mind Check, developed and being implemented in Australian schools.

Assessing and diagnosing neurodevelopmental disorders are challenging, particularly in remote communities where limited specialist services are available. Conducting neurodevelopmental assessments in primary care could aid early detection and intervention for developmentally vulnerable children, but systemic issues like limited workforce scope and capacity, limited remuneration for the time required, and lack of culturally-responsive approaches make it challenging. Three case studies demonstrate how the Tracking Cube, a culturally-responsive model of care co-designed with a remote First Nations community, can be used to identify children with a range of neurodevelopmental disorders within primary care.

Anxiety problems are prevalent among children and young people, yet few families access treatment. Parent-led interventions are one method of increasing access, but little is known about how outcomes and experiences of such interventions translate from tightly controlled research studies to the "real world" and, where it has been evaluated in "real world" settings, to what extent intervention delivery fully reflects routine practice. This systematic review identified 14 studies with broadly positive outcomes; however, there was a dearth of detail surrounding the nature of the "routine practice" settings. More research and thorough reporting are needed to close the research-implementation gap.

There is a high demand for youth mental health intervention that is not adequately addressed by current models of care. Stratified and staged models offer a promising solution, balancing increased access and resource conservation with timely and effective treatment. This scoping review investigated available evidence on the use of stratified or staged care models in youth mental illness. Forty-two studies were identified; however, the literature was narrowly focused in terms of care setting, study design, aims, and model. Future research should explore diverse models across contexts and cultures, using experimental designs and targeting a broader range of presentations.

Chronic illnesses affect nearly half of US adults, and nearly 30% of these patients suffer from a co-occurring mental health problem. Despite the high prevalence of comorbidity, existing treatments and service delivery approaches largely reflect fragmented, disease-specific care. Acceptance and commitment therapy (ACT) is a transdiagnostic behavioral intervention that is effective at promoting health behavior change and reducing distress among patients. ACT targets avoidance, helps individuals accept what cannot be changed with greater equanimity, and fosters the development of skills to engage more fully in meaningful life activities. Notably, ACT has been successfully implemented in hospitals, primary care, and specialty care settings.

Acceptance and commitment therapy (ACT)-enhanced behavior therapy (A-EBT) is the most empirically supported treatment of trichotillomania. Support for A-EBT for excoriation disorder is budding. In this article, we review the A-EBT model, including support for targeting psychological inflexibility, as well as the use of traditional behavioral procedures to reduce non-focused behaviors. To date there are 17 studies investigating A-EBT for trichotillomania and skin picking across ages and treatment delivery methods (individual, group, telehealth, and asynchronous web-based delivery). The work has occurred by multiple research teams. Data on processes of change are reviewed. Future directions and limitations are discussed.

Acceptance and commitment therapy (ACT) conceptualizes eating disorders (EDs) as rigid attempts to solve the problem of human suffering through food, eating or weight control. Case formulation and intervention is based on functional assessment of ED behaviors and informed by common patterns of psychological flexibility observed across dimensions of cognition, emotion, self, motivation, and overt action. ACT interventions, combined with other evidence-based practices for EDs, can be used to disrupt ED behaviors and increase the individual's capacity to meet their physical and emotional needs adaptively. ACT shows promise as a treatment for individuals with EDs; however, more studies are needed.

Acceptance and Commitment Therapy (ACT) is a third wave cognitive-behavioral approach with demonstrated effectiveness in treating substance use disorders (SUDs). ACT aims to improve psychological flexibility via 6 core processes: acceptance, cognitive defusion, present-moment awareness, self-as-context, values, and committed action. Through these processes, ACT encourages adaptive and values-congruent behaving rather than substance use as a coping strategy. ACT offers a holistic framework for long-term behavior change and overall well-being, fostering psychological resilience and self-awareness to individuals struggling with SUDs.

Acceptance and commitment therapy (ACT) for posttraumatic stress disorder (PTSD) is focused on reducing experiential avoidance and increasing psychological flexibility in the face of traumatic experiences. This approach involves using acceptance and mindfulness to help people who have experienced trauma to increase their commitment to values-based living. There is growing evidence for the potential efficacy of ACT for PTSD, with several pilot clinical trials showing reductions in PTSD symptoms and increases in quality of life, as well as improvements in ACT-associated processes. Future research should focus on larger clinical trials that evaluate the efficacy of ACT for people with PTSD.

This review provides a conceptual and empirical overview of acceptance and commitment therapy (ACT) as a treatment for hoarding. ACT uses a functional contextual model to conceptualize hoarding as a narrowed behavioral repertoire caused by psychological inflexibility. ACT for hoarding focuses on fostering psychological flexibility to expand the behavioral repertoire in ways that align with values. ACT can be tailored to address common clinical issues in hoarding such as problems in insight and motivation, relational difficulties, and executive dysfunction. Initial evidence from three clinical trials suggests ACT for hoarding is efficacious, but more research is needed.

Acceptance and commitment therapy (ACT) is a promising new treatment approach for transdiagnostic youth mental health concerns. ACT has been extensively researched in adult populations. However, significantly less evidence is available for children and adolescents. This article presents the available evidence on ACT for youth, with a special emphasis placed on the potential benefits for utilizing ACT during developmental years. Recommended adaptations to ACT for youth are identified and compared to ACT for adults. Given the growing body of research supporting ACT as a transdiagnostic psychotherapy for youth, future research directions in treatment efficacy, effectiveness, and dissemination research are discussed.

We provide critical considerations regarding the acceptance and commitment therapy (ACT) science. We discuss the reconsideration and potential dismissal of latent disease diagnoses in ACT science. We echo sentiments against employing standardized protocols. We identify concerns regarding the evidence of ACT process research. We also discuss measurement problems within the ACT literature and advocate for new and improved ACT measures. We conclude that there is considerable evidence for ACT, but that the underlying research has important growth areas. We also conclude that it is possible for ACT to demonstrate incremental and discriminant effects that are meaningful in real-world scenarios.

Acceptance and commitment therapy (ACT) is a set of evidence-based principles designed to reduce human suffering and promote well-being via instantiating psychological flexibility. Situated within the broad family of cognitive-behavioral therapies, ACT conceptualizes psychopathology in terms of 6 inter-related psychological inflexibility processes. ACT is supported by a substantial body of research and recognized as an evidence-based intervention by numerous government and health care organizations. Due to its process-based nature, ACT has been adapted across a range of diverse areas. In this article, we provide an overview of ACT across conceptual, clinical, and research domains, and introduce this special issue.

While exposure and response prevention (ERP) remains the gold standard for obsessive-compulsive disorder (OCD) treatment, acceptance and commitment therapy (ACT) offers a complementary approach by enhancing psychological flexibility, focusing on valued actions, and addressing experiential avoidance. The article highlights ACT's potential to improve engagement and outcomes in OCD treatment, particularly for those who do not respond fully to traditional ERP. Empirical evidence supports ACT's effectiveness, suggesting it as a viable alternative or adjunctive therapy for OCD.

Acceptance and commitment therapy (ACT) is a third-wave cognitive-behavioral therapy, which focuses on acceptance, mindfulness, and values-based actions to support living a rich and meaningful life. ACT has been successfully applied to support recovery from psychosis across multiple contexts. This article provides an overview of ACT for psychosis, followed by an outline of how to effectively adapt ACT to support individuals experiencing psychosis, including various practical clinical tips for practitioners. Finally, an overview of the research literature supporting the efficacy of ACT for psychosis is presented, and consideration of next steps in research and clinical innovations.

Outcome research on the efficacy of acceptance and commitment therapy (ACT) has established it as an evidence-based cognitive-behavioral approach in treatment of depression. Mediational and related research, however, has provided mixed support for the sensitivity and specificity of ACT's purported processes of therapeutic change according to model of psychological flexibility on which it is based. Whether an emerging idionomic approach to process-based interventions, such as ACT for depression that is more tailored to the lived experiences of individual clients enhances its efficacy, while also providing a more coherent understanding of its mechanisms of action, is currently an unanswered empirical question.

Treating anxiety disorders with acceptance and commitment therapy (ACT) has a strong theoretical and empirical foundation. In this overview, we review the theoretic basis for using ACT to treat anxiety disorders, its clinical applications, research evidence to date, and future directions. We highlight how the process and goals of conducting behavioral exposure in ACT are distinct from exposure in classic cognitive behavioral therapy approaches.

Acceptance and commitment therapy (ACT) emphasizes psychological flexibility as a key set of processes that improve mental and behavioral health outcomes. Our field needs to shift from syndrome-based interventions to a process-based approach, focusing on biopsychosocial change processes relevant to each particular person, couple, or family. ACT extends its 6 core processes to encompass all well-validated change mechanisms including those at the social or biophysiological levels. It is time to challenge the hegemony of traditional psychiatric classification in favor of a personalized precision psychiatry rooted in functional analysis, idionomic statistics, and multidimensional, multilevel evolutionary science.