Multilevel developmental perspectives toward understanding internalizing psychopathology: current research and future directions.

This Special Issue of Development and Psychopathology is devoted to a multilevel developmental understanding of internalizing psychopathology. In an earlier Special Issue (Burnette & Cicchetti, 2012), contributors focused upon a multilevel developmental perspective of externalizing pathology. Internalizing and externalizing expressions of dysfunction comprise one of the most widely agreed upon classifications of behavior disorders in psychopathology research. Over the course of the past three decades, in part due to the scope and magnitude of these problems, developmental psychopathologists have devoted increased research attention to these two broad expressions of dysfunction. Until relatively recently, the amount of research on internalizing problems has lagged behind that of investigations on externalizing disorders. The contributions to this Special Issue are testimony to some of the exciting multidomain and multilevel advances that have occurred in the developmental approach to internalizing pathology. Depression, and by extension, internalizing psychopathology more broadly, is a complex, multilevel phenomenon (Cicchetti & Toth, 1995, 1998; Goodman & Gottlib, 1999). The developmental psychopathology perspective challenges researchers investigating internalizing problems in children and adults to move beyond identifying isolated cognitive, social–cognitive, affective, interpersonal, and biological aberrations in internalizing pathology, to understanding the processes by which these components have evolved and are integrated within and across the biological and psychological systems of the depressed/anxious person embedded within a multilevel and dynamic cultural and social ecology (Causadias, 2013; Ciccchetti & Toth, 1998). In order to comprehend the nature, causes, course, and mechanisms of internalizing psychopathology, an integrative perspective that investigates multiple factors at different levels of dynamic developmental systems is necessary. To fully comprehend the complexity of depression and internalizing psychopathology, it is essential that a multiple levels of analysis approach and an interdisciplinary perspective be incorporated into the research methods of developmental psychopathologists. Depression and anxiety have been a major topic of inquiry among individuals from a number of scientific disciplines, including not only psychiatrists and clinical and developmental psychologists but also anthropologists, sociologists, geneticists, and neuroscientists. A recent search we conducted via PsychINFO identified over 340,000 articles with a keyword “depression,” over 280,000 with “anxiety,” and over 16,000 with “internalizing.” Clearly, depression and internalizing pathology are already topics that have received abundant attention. Why then should a Special Issue be devoted to them now? We think that there are several gaps in our knowledge base about internalizing psychopathology that we are striving to fill with this Special Issue. One major gap is that there are relatively few investigations that have charted the processes that unfold over the course of the development of depression and internalizing pathology. There is a pressing need for developmental studies that are concerned with elucidating how, when, and for whom internalizing psychopathology arises, changes, is maintained, recovers, and is prevented in the course of development. Another equally important gap that exists is that there is a relative paucity of interdisciplinary developmental research on depression and internalizing psychopathology. The limited amount of communication between disciplines hampers the ability to undertake such multilevel research. Because of the growing interest in adopting interdisciplinary research perspectives (Gunnar & Cicchetti, 2009; Pellmar Address correspondence and reprint requests to: Dante Cicchetti, Institute of Child Development, University of Minnesota, 51 East River Road, Minneapolis, MN 55455; E-mail: [email protected]; or Misaki N. Natsuaki, Department of Psychology, University of California, Riverside, 900 University Avenue, Riverside, CA 92521; E-mail: [email protected]. Development and Psychopathology 26 (2014), 1189–1190 # Cambridge University Press 2014 doi:10.1017/S0954579414000959