HiTOP thought disorder, DSM-5 psychoticism, and five factor model openness

HiTOP internalizing, detachment, antagonistic externalizing, and disinhibited externalizing align comfortably with respective domains of the Five-Factor Model (FFM) of general personality. The alignment of HiTOP thought disorder and DSM-5 Section III psychoticism with FFM openness though has been disputed, with the existing research obtaining weak and/or inconsistent results. The purpose of the current paper is to discuss possible reasons for this problematic alignment. The strength of the relationship is hindered in part because it is an alignment of a largely adaptive domain of personality with an entirely maladaptive domain (whereas this is not the case for the other four HiTOP-FFM alignments). The strength of the relationship is also affected by how both openness and psychoticism have been conceptualized and/or assessed.