A longitudinal study from Norway connects early behavioral patterns and experiences, such as bullying and emotional difficulties, to the emergence of cluster A personality traits in teens. A new preprint study reveals that specific childhood traits and experiences can predict the development of certain personality disorders in adolescence. Notably, the current work did not find a link between developing cluster A personality disorder traits in adolescence and factors such as attachment style, autism spectrum disorder symptoms, and serious adverse life events in childhood. The current work has not yet been through peer review. By tracing this loop of traits, environments, and responses, the authors attempt to clarify developmental pathways that may lead to what psychiatry now terms cluster A personality disorder traits.