Development of the Japanese version of the Ego‐Dissolution Inventory (EDI)
Keisuke Kusudo, Hideaki Tani, Kengo Yonezawa, Shinichiro Nakajima, Matthew M. Nour, Robin Carhart-Harris, Hiroyuki Uchida
Neuropsychopharmacology Reports March 13, 2024 DOI: 10.1002/npr2.12419 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Translation and cultural adaptation study Peer reviewed |
|---|---|
| Topics | Depression Ego dissolution |
| Keywords | Edi Ego‐dissolution inventory Human Psychedelics: psychedelics Psychedelic-assisted therapies Ego-dissolution: ego-dissolution Ego-dissolution experience Ego-dissolution inventory Conditions like depression Vital tool Assessing Enhancing research |
| Citations | 2 |
| Key points | A Japanese version of the Ego-Dissolution Inventory was successfully developed and approved by the original authors. |
Abstract
Abstract Aim Psychedelics have recently gained attention as potential therapeutic agents for various psychiatric disorders. Previous research has highlighted that a diminished sense of self, commonly termed “ego‐dissolution” is a pivotal feature of the psychedelic‐induced state. While the Ego‐Dissolution Inventory (EDI) is a widely acknowledged instrument for measuring this phenomenon, no Japanese version has been available. This study aimed to develop a Japanese version of the EDI.
Methods: We adhered to the “Guidelines for Best Practices in the Translation and Cultural Modification Process for Patient‐Reported Outcomes Instruments: Document from the ISPOR Committee on Translation and Cultural Modification” during our translation approach. Two Japanese psychiatrists independently conducted initial translations, and a consolidated version was achieved via mutual agreement. This version was then back‐translated to English and assessed by the original authors for consistency. The repetitive modification process was conducted in continuous dialogues with the original authors until they accepted the concluding back‐translated version.
Results: The finalized, approved back‐translated version of the EDI is presented in the accompanying figure. In addition, the authorized Japanese version of the EDI is included in the Appendix.
Conclusions: In this study, we successfully developed the Japanese version of the EDI. This instrument will assist in assessing ego‐dissolution experiences associated with psychedelic‐assisted therapy among Japanese speakers. Additional studies are necessary to evaluate the reliability and validity of this newly translated instrument.