Self-published Letter to Editor This Letter to Editor was intended for the Psychophysiology journal published by Wiley-Blackwell (ISSN: 0048-5772) as a comment to recently published paper: Wolpert N, Rebollo I, Tallon-Baudry C. Electrogastrography for psychophysiological research: Practical considerations, analysis pipeline, and normative data in a large sample. Psychophysiology 2020; e13599. doi: 10.1111/psyp.13599. Psychophysiology journal doesn't accept Letters to Editors ("Letters to the Editor or commentary papers on other articles are not accepted.", https://onlinelibrary.wiley.com/page/journal/14698986/homepage/forauthors.html, Assessed on August 12, 2020), although Wiley Publisher advises that "Journals should facilitate post-publication academic debate1 either on their site, through letters to the editor, or on an external moderated site." (see Best Practice Guidelines on Research Integrity and Publishing Ethic, https://authorservices.wiley.com/ethics-guidelines/index.html, Assessed on August 12, 2020). 1: External link to CORE Practices, https://publicationethics.org/core-practices, Assessed on August 12, 2020. Background Editorial board of Psychophysiology has offered a direct and off-line communication with the Authors of the manuscript that we commented on. As we believe in an open revision of unpublished and published scientific materials, we decided to self-publish this Letter to Editor on Zenodo repository. Also, we added a comment on PubPeer.