However, self-perceptions may not be ideal for understanding how disagreeable youth interact within close relationships, as these youth in many instances might not even know that they are acting in a disagreeable manner. Observations are useful for addressing this shortcoming and have been used to understand the enduring qualities of interaction-styles, particularly when trying to understand unique profiles across individuals. Further, understanding the interactional style in adolescence that lead to an enduring disagreeable personality-type has tremendous usefulness.
The current study utilized observational, multi-reporter data collected over a 10-year span to identify and track the development and relationships of disagreeable youth (see Figure 1 for conceptual overview). Observations of target youth and their friends at age 14 and 15 were used to assess early adolescent disagreeableness in terms of rudeness, lack of cooperation, and forcefulness. In order to track the relationship blindness of these disagreeable youth, reports from friends in middle adolescence and from romantic partners in