The primary objective of the present set of studies is to address the gap in the literature regarding our understanding of the latent structure of ODD through an examination using taxometric analyses. Furthermore, to consider a developmental perspective, data from both a large child community sample and data from a large adult mixed psychiatric/control sample were used. Each of the two data sets included a measure directly assessing the eight symptoms (i.e., indicators) of ODD. For the child data set, multiple informants (including mother- and teacher-reports) were available; for the adult data set, ratings were self-report of current symptoms.
