Depending on the specific nature of the feedback, someone who does something describable as this could be providing anywhere from 0 to 99% of the scientific insight provided by the paper.
Regardless, if you showed up to a weekly meeting, and provided insight into the data provided, then it does sound like you deserve authorship.
I would have been OK with a simple credit in the paper (an acknowledgement) but after the fact I realized I had been invited to meetings specifically to justify my co-authorship.
I would agree that you were invited specifically to justify giving you co-authorship. As evidenced by the existence of our conversation right now, exactly what level of involvement justifies co-authorship is fuzzy at the margins; whatever their personal views, they were probably doing you a favor by moving your involvement from the fuzzy zone into the hard-to-argue-with zone. Even if everyone directly involved in the paper thinks "being an intern host justifies authorship" the presence of some senior institutional figure who disagrees could cause problems for you.
Folks who do this should be shunned by their peers and driven out of academia. It's exploitative and coercive.
But I have also been a reviewer in a situation where a supposed broad review article for a preeminent journal completely ignores citing a massive amount of relevant prior work (except, conveniently, the authors’ own work, which in many cases was cited over more relevant and important earlier work), including a large number of my own articles.
> Substantial contributions to the conception or design of the work; or the acquisition, analysis, or interpretation of data for the work; AND
> Drafting the work or reviewing it critically for important intellectual content; AND
> Final approval of the version to be published; AND
> Agreement to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.
So you are right. The corresponding author who got funding for the postdoc who designed the experiment for the graduate student that supervised undergradutes and wrote the paper would have a pretty tenuous commection to authorship.
But good luck to everyone else in that chain publishing without them.
Ref: https://www.icmje.org/recommendations/browse/roles-and-respo...