Preface. Introduction. Acknowledgments. Relational processes and mental health: a bench-to-bedside dialogue to guide DSM-V. Biological Underpinnings. Neurobiology of the social brain: lessons from animal models about social relationships. Refining the categorical landscape of DSM: role of animal models. Marriage, health, and immune function. Family expressed emotion prior to onset of psychosis. Genetic strategies for delineating relational taxons: origins, outcomes, and their relation to individual psychopathology. Assessment. Childhood maltreatment and adult psychopathology: some measurement options. Taxometrics and relational processes: relevance and challenges for the next nosology of mental disorders. Relational diagnoses: from reliable rationally derived criteria to testable taxonic hypotheses. Defining relational disorders and identifying their connections to Axes I and II. Expressed emotion and DSM-V. Prevention and Treatment. Prevention as the promotion of healthy parenting following parental divorce. Cultural and relational processes in depressed Latino adolescents. Role of couples relationships in understanding and treating mental disorders. Summary and Implications for Future Research. Recommendations for research on relational disorders and processes: a roadmap for DSM-V. Index.