Intriguing new findings on how genes and environments work together through different stages of life take the spotlight in this significant collection. Studies from infancy to late adulthood show both forces as shaping individuals' relationships within family and non-family contexts, and examine how these relationships, in turn, continue to shape the individual. Transitional periods, in which individuals become more autonomous and relationships and personal identities become more complicated, receive special emphasis. In addition, chapters shed light on the extent to which the quantity and quality of genetic and environmental influence may shift across and even within life stages.

Included in the coverage:

Gene-environment interplay in parenting young children.The sibling relationship as a source of shared environment.Gene-environment transactions in childhood and adolescent problematic peer relationships.Toward a developmentally sensitive and genetically informed perspective on popularity.Spouse, parent, and co-worker: roles and relationships in adulthood.The family system as a unit of clinical care: the role of genetic systems.

Behavioral geneticists, clinical psychologists, and family therapists will find inGene-Environment Interplay in Interpersonal Relationships across the Lifespan a window into current thinking on the subject, new perspectives for understanding clients and cases, and ideas for further study.

Briana N. Horwitz, Ph.D., is an assistant professor in the Department of Psychology at California State University, Fullerton. She completed her undergraduate studies at The University of California, Los Angeles and her doctoral studies at the University of California, Irvine. She also served as a postdoctoral fellow under the advisement of Dr. Neiderhiser at the Pennsylvania State University. Her research interests are in understanding the sources and directions of the associations among interpersonal relationships and functioning across the lifespan and more specifically to investigate how genetic and environmental factors explain these associations.

Jenae M. Neiderhiser, Ph.D., is Liberal Arts Research Professor in the Department of Psychology and Professor of Human Development and Family Studies at The Pennsylvania State University. She completed her undergraduate studies in Psychology at The University of Pittsburgh and her doctoral studies in Human Development and Family Studies at The Pennsylvania State University. She is currently serving as Associate Editor for theJournal of Research on Adolescenceand is on the editorial board ofDevelopment and PsychopathologyandChild Development. She is also serving as a board member for the Society for Prevention Research. Her research interests are in understanding the interplay between genes and environment throughout the lifespan. The environmental influences that she has examined most closely are interpersonal relationships-including parent-child, spouse, sibling, and peer relationships. Examining how individuals influence their environments, in part because of their genetically-influenced characteristics, has long been a focus on her work.

The sibling relationship as a source of shared environment.- Gene-environment transitions in childhood and adolescence problematic peer relationships.- Gene-environment processes in adolescent family relationships.- Toward a developmentally sensitive and genetically informed perspective on popularity.- Spouse, parent, and co-workers: Relationships and roles during adulthood.- Interpersonal relationships in late adulthood.- The family system as a unit of clinical care: The role of genetic systems.