Tracking a preprint to publication: a worked example — the long version

Posting this under the heading it deserves: Tracking a preprint to publication: a worked example — the long version Everything below is what sits behind that.

A preprint question rather than a question about the finding in it.

The manuscript is on a preprint server, dated, with a version number I have written down. It has not been through review and the authors say so in the header. What I cannot work out is how much weight that leaves it carrying.

I would like the reasoning rather than a rule. "Wait for publication" is not usable when the publication may be two years away and the question is now.

Coming back to the opening post, because the follow-up matters more than the original answer.

Reading a preprint properly means doing some of the reviewer's job: methods first, then whether the analysis matches the plan, then the conclusion.

Picking up the opening post: that is the part I would want checked first.

Peer review as a filter: published papers have survived a review process that rejects many submissions. Preprints have not. Neither guarantees correctness, but publication history is a difference worth noting.

If you cite a preprint in a maintained document here, the convention is to label it in the sentence and to note the check date. The document review will catch the update.

Written from notes rather than memory, which is why the numbers are specific.

Server repositories: medRxiv for medicine, bioRxiv for biology. Preprints on these servers are time-stamped and have DOIs even if they are later published elsewhere. Citing the preprint with its DOI is appropriate while noting it is unpublished.

Small point, but it is the one that usually catches people.

Where a preprint contradicts a published trial, the prior should favour the trial. Where it extends one, the preprint can be genuinely useful.

Worth one more sentence than it usually gets.

I will take the caveat as seriously as the claim, which is the point of putting it there.

Narrowing post #6, because the general version has more than one answer.

Unrefereed work is not worthless. A great deal of it survives review substantially unchanged. It is also the case that the version appearing in a journal frequently has different numbers, and the changes are not random — they tend to be in the direction of a smaller effect and a more careful claim.

Not the answer, but possibly the question that gets there.

Version numbers on a preprint server matter. Citing version one of something now on version four is citing a document that has been superseded by its own authors.

I have kept the units in throughout, for the obvious reason.

I read post #9 twice before replying, because I had assumed the opposite.

Always label it as a preprint in any discussion. A preprint is not a published trial and it is not settled knowledge. Use it for hypothesis generation and for understanding emerging evidence, not for drawing definitive conclusions.

Not the whole picture, but the part of it I can speak to.

Post #9 answers the question as asked. The question underneath it is different.

Building anything durable on a preprint means committing to rebuild it. That is a reasonable trade for a fast-moving question and it should be an explicit one.

That matches what I was told, which is not the same as knowing it.

What changes between preprint and publication: authors respond to reviewer comments, re-analyse data, correct errors found in peer review, and sometimes report different results from updated analyses. The published version is not the same as the preprint.

Screening on a preprint server is minimal and is not review. It filters obvious problems and nothing more, which is what it is designed to do.

Noting that I have skin in this question and have tried to discount for it.