Ideal Type and Essential Type — They Need Each Other

In light of the ongoing validity crisis in psychiatric classification, phenomenologically oriented psychiatric study has gained traction. This paper assesses two modes of investigation proposed by phenomenologists in studying mental disorders: the ideal type approach and the essential type approach. Despite the recent suggestion that they are antithetical approaches, I argue that they should constantly constrain and inform each other. In short, I advance a mutual complementarity thesis. Having established this thesis, I conclude by demonstrating how this proposal can function as an heuristic strategy for effectively facilitating the recently proposed psychiatric research initiative, i.e. the ontological project of phenomenological psychopathology.