Abnormal child psychology chapter 2: theories and. Interrelated causes of abnormal" child behaviour: biological influences, emotional influences, behavioural and cognitive influences, family, cultural, and ethnic influences. Considers how biological, psychological, and environmental processes interact to produce the outcomes that are observed over time. Biological determinants focused on structural brain damage or dysfunction, neurotransmitter imbalances, and genetic influences. Psychological and environmental models emphasize role of environmental toxins, early experiences, learning opportunities, disciplinary practices, family systems, sociocultural contexts. Developmental psychopathology: approach to describing and studying disorders of childhood, adolescences and beyond in a matter that emphasizes the importance of developmental processes and tasks. Framework for organizing study of abnormal child psychology around milestones and sequences in psychical, cognitive, social-emotional, and educational development. Central belief of developmental psychopathology is that to understand maladaptive behaviour adequately, one must view it in relation to what is normative for a given period of development.