These notes are based on the course Developmental Psychopathology in 2016/2017. Determining abnormalityWe use developmental norms to make decisions about behavior. Developmental norms are norms about the normal development of for example, blather control. Behavioral indicators of disorder are developmental delay, developmental regression or deterioration, extremely high of low frequency of behavior, extremely high of low intensity of behavior, behavioral difficulty persisting over time, behavior inappropriate to the situation, abrupt changes in behavior, several problem behaviors and behavior qualitatively different from normal. This is summed-up in table 1.1 in abnormal child and adolescent psychology (Wicks-Nelson & Isreal, 8th edition, 2013, page 3).We are influenced by cultural norms, gender norms and situational norms. Situational norms are used in situations where for example a child is running. This is appropriate when de child is outside and playing, but inside it’s less appropriate behavior. The role of adults is also important. Adults decide whether something is seen as normal or not. The definition of abnormality is ever changing and it’s important when deciding about someone’s behavior, to look at if it’s harming the person of interfering with their lives.ClassificationClassification can be done by using the empirical approach or the clinical approach. Generally, problem behavior exists when there is a cluster of symptoms, also called a syndrome. The...