Chapter 1: Introduction to Psychopathology in Children and Adolescents

The chapter traces major intellectual influences on the field, including the philosophical contributions of John Locke and the clinical work of Jean Marc Itard, whose early approaches to understanding developmental differences shaped modern perspectives. Central to the chapter is the distinction between historical conceptualizations such as moral insanity and intellectual disability, which reflected earlier assumptions about children's psychological functioning, and contemporary diagnostic approaches grounded in empirical research. The chapter introduces critical constructs including risk factors—characteristics or circumstances that increase the likelihood of psychological difficulties—and protective factors, which serve as buffers against adversity and promote resilience. The emergence of behaviorism as a major theoretical perspective is discussed through foundational experiments and principles that shifted focus from unconscious processes to observable behavior and environmental influences. Particular attention is given to how socioeconomic disadvantages and poverty create cumulative stress and reduce access to resources, thereby increasing vulnerability to various psychological disorders during childhood and adolescence. The chapter emphasizes that understanding child psychopathology requires integrating historical knowledge with contemporary scientific understanding, recognizing biological, psychological, and social factors that contribute to mental health problems. This foundational material prepares students to appreciate the complexity of diagnosing and treating psychological conditions in young people by highlighting how developmental stages, environmental contexts, and individual differences all influence the expression and progression of mental health difficulties across childhood and adolescence.