A researcher reviews a longitudinal study that followed two groups of people from childhood into their 30s. Group A consisted of 135 adults who were identified with symptoms of a specific neurodevelopmental disorder as children. Group B, the control group, consisted of 136 adults without a childhood diagnosis of this disorder. The study found that, on average, individuals in Group A had completed fewer years of school, held less prestigious jobs, and reported fewer close friendships than individ