PubPeer – A universal comment and review layer for scholarly papers?

Lately I’ve had a plethora of discussions with colleagues concerning the possible benefits of a reddit-like “democratic review layer”, which would index all scholarly papers and let authenticated users post reviews subject to karma. We’ve navel-gazed about various implementations ranging from a full out reddit clone, a wiki, or even a full blown torrent tracker with rated comments and mass piracy. So you can imagine I was pleasantly surprised to see someone actually went ahead and put together a simple app to do exactly that.


Pubpeer states that it’s mission is to “create an online community that uses the publication of scientific results as an opening for fruitful discussion.” Users create accounts using an academic email address and must have at least one first-author publication to join. Once registered any user can leave anonymous comments on any article, which are themselves subject to up/down votes and replies.

My first action was of course to search for my own name:


Hmm, no comments. Let’s fix that:


Hah! Peer review is easy! Just kidding, I deleted this comment after testing to see if it was possible. Ostensibly this is so authors can reply to comments, but it does raise some concerns that one can just leave whatever ratings you like on your own papers. In theory with enough users, good comments will be quickly distinguished from bad, regardless of who makes them.  In theory… 

This is what an article looks like in PubPeer with a few comments:


Pretty simple- any paper can be found in the database and users then leave comments associated with those papers. On the one hand I really like the simplicity and usability of PubPeer. I think any endeavor along these lines must very much follow the twitter design mentality of doing one (and only one) thing really well. I also like the use of threaded comments and upvote/downvotes but I would like to see child comments being subject to votes. I’m not sure if I favor the anonymous approach the developers went for- but I can see costs and benefits to both public and anonymous comments, so I don’t have any real suggestions there.

What I found really interesting was just to see this idea in practice. While I’ve discussed it endlessly, a few previously unforeseen worries leaped out right away. After browsing a few articles it seems (somewhat unsurprisingly) that most of the comments are pretty negative and nit-picky. Considering that most early adopters of such a system are likely to be graduate students, this isn’t too surprising. For one thing there is no such entity as a perfect paper, and graduate students are often fans of these kind of boilerplate nit-picks that form the ticks and fleas of any paper. If comments add mostly doubt and negativity to papers, it seems like the whole commenting process would become a lot of extra work for little author pay-off, since no matter what your article is going to end up looking bad.

In a traditional review, a paper’s flaws and merits are assessed privately and then the final (if accepted) paper is generally put forth as a polished piece of research that stands on it’s on merits. If a system like PubPeer were popular, becoming highly commented would almost certainly mean having tons of nitpicky and highly negative comments associated to that manuscript. This could manipulate reader perceptions- highly commented PubPeer articles would receive fewer citations regardless of their actual quality.

So that bit seems very counter-productive to me and I am not sure of the solution. It might be something similar to establishing light top-down comment moderation and a sort of “reddiquette” or user code of conduct that emphasizes fair and balanced comments (no sniping). Or, perhaps my “worry” isn’t actually troubling at all. Maybe such a system would be substantially self-policing and refreshing, shifting us from an obsession with ‘perfect papers’ to an understanding that no paper (or review) should be judged on anything but it’s own merits. Given the popularity of pun threads on reddit, i’m not convinced the wholly democratic solution will work. Whatever the result, as with most solutions to scholarly publishing, it seems clear that if PubPeer is to add substantial value to peer review then a critical mass of active users is the crucial missing ingredient.

What do you think? I’d love to hear your thoughts in the comments.

6 thoughts on “PubPeer – A universal comment and review layer for scholarly papers?

  1. I think I would be able to weed through the comments that are nit picky and determine for myself if comments are valuable. I for one welcome all comments on my own papers and I’m not sure I would let the comments on pubpeer influence whether or not I cite a paper (unless the comments were good).

  2. The history and main arguments of the idea of anonymous post-publication peer-review are described in detail in the article referenced below. You might be interested to read it and comment. Basically, the original idea was proposed in 2008 by the user genereg (pseudo-anonymously) and that proposal has lead to a very hot discussion with more than 100 comments online. At that time this idea was very strongly opposed by the main “Science 2.0 thinkers”. The link to this thread can be found in the acknowledgements section of the following article :

  3. PubPeer appears to be a variant with similarities to BioMed Critical Commentary ( BMCC was popularized in the journal Science, 21 November 2008 322: 1169. To my knowledge, the first public notification of repeated use of altered images in publications by Savio Woo was from BMCC ( and, subsequent to an alert submitted to me. PubPeer now has a nice addition by uncovering repeated use of images in the cloning article. Congratulations to PubPeer. SE Kern, Editor, BioMed Critical Commentary

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