This article describes the development of the Hungarian version of the Multidimensional Inventory of Dissociation (MID-HU). The MID is a 218-item, self-administered, multi-scale instrument that comprehensively assesses the phenomenological domain of pathological dissociation and is suitable for diagnosing dissociative disorders. We used a multi-source approach to reach participants. We collected data from the psychiatric and addiction wards of two hospitals, private practices, and from online sources. Finally, the results of 323 participants were analyzed. We used the participants’ DES and MID-HU results to classify them into five groups: (1) Healthy control group, (2) Dissociative disorder group, (3) Dissociative symptoms group, (4) Psychiatric inpatients group without dissociation and substance use disorder (SUD) and (5) Alcohol dependent inpatients without dissociation. For testing discriminant validity we used several sections of SR-DDIS.

The MID-HU had strong internal consistency, temporal stability and strong structural, convergent and discriminant validity. Factor analysis of the MID-HU extracted a single factor: dissociation. Our results are similar to other international findings. We also found that the mean MID-HU correlated strongly with two SR-DDIS subscales: ’Features associated with DID’ (r: 0.79) and the ’Schneiderian first-rank symptoms’ (r: 0.62), while only at a moderate level with the other subscales (r: 0.40). The two dissociative groups proved to be significantly more traumatized than the other groups, although we found childhood traumatization in the psychiatric and AD inpatient groups as well, which affected the construct validity results. The DD group proved to be most severely traumatized among the five groups of participants.