A confirmatory bifactor analysis of the hospital anxiety and depression scale in an Italian community sample. (cambridge.org)
We contribute to the literature on the relations of temperament to externalizing and internalizing problems by considering parental emotional expressivity and child gender as moderators of such relations and examining prediction of pure and co-occurring problem behaviors during early to middle adolescence using bifactor models (which provide unique and continuous factors for pure and co-occurring internalizing and externalizing problems). (cambridge.org)
Besides that, the inspection of model's parameters lead us to conclude that in our community sample, as in similar studies testing bifactor models and involving both clinical and community participants, all HADS items, except item # 14, loaded more highly on the general factor than on each specific group factor. (hqlo.biomedcentral.com)