Showing posts with label Tales from the science trenches. Show all posts
Showing posts with label Tales from the science trenches. Show all posts

Monday, March 12, 2012

Tales From The Science Trenches: The unasked question


Note: This post reflects my final diatribe on the issue of modern scientific publishing for a little while.  While I think that this is definitely a flawed process in desperate need of fixing, I also think there are other issues that deserve our collective attention much more urgently. I will get to those in upcoming posts.

After a dreadfully long hiatus (due to being on the job market), I have finally returned to the world of blogging.

I've decided to get back to the topic I left hanging a few months ago: the so-called publication "crisis" the field of cognitive neuroscience.  Regular readers of this blog already know my opinions of this problem, but a little bit of time has added maturity and nuance to my opinions on this matter.

In my travels these past few months I've had the opportunity to discuss the flaws of modern review process at length with many well respected colleagues.  I've heard the good, the bad and the in-between about life on the front lines of scientific publishing.  Some say it's way too difficult to publish today (or dreadfully biased). Others say it's too easy. But almost everyone agrees that it's a real pain in the ass.

I don't want to spend too much time on the status of the current system.  Dwight Kravitz & Chris Baker have published a very complete background & review of this topic that has garnered a lot of good attention.  I highly recommend it for anyone interested in this topic, if only to get a good understanding of how we got to where we are today.

So for our purposes today, let's consider some anecdotal stories relayed to me by colleagues.

The Bad

When given the choice between hearing "good news" and "bad news" I always accept the bad news first.  So let's start by considering an example of where the process falls apart (from a colleague working in Ireland).
Submitted a manuscript Journal X [Note: obviously not the real journal name] in April 2010, received an email in mid June expecting this to be reviews, this was in fact an email from the editor saying they would send it out to review. Mid-Oct 2010 (1 day before it reached 6months since submission!) we received an apologetic email and a decision, invited to resubmit based on the reviewer comments. I say reviewer because we only had one reviewer, the other had broken contact with the journal. Mid August 2011(6 months since re-submission, 1 and a half years since the initial submission), it appeared that the initial reviewer whose comments we’d addressed had also broken contact with the journal and we once again only had a single new review.  At this stage they just accepted the article pending revisions based again on the single reviewer.

Two other slightly irksome reviews both from Journal Y; in one case a reviewer told us we needed to discuss the role of the basal ganglia although this was a cerebellar paper, in the next round of reviews a different reviewer said “why are you discussing the basal ganglia in a cerebellar paper”. The second more annoying one was from one of an anatomy paper which used one of the most highly cited articles in my field (Kelly and Strick, 2003) to justify my regions of interest. The reviewer said Kelly and Strick were wrong and therefore we were wrong!

This highlights serveral key problems brought up again and again in my conversations with colleagues (and discussed at length by Kravitz & Baker).

First, there's the needless lag in getting the article turned around.  Fifteen years ago, when manuscripts had to be physically mailed to journals, it was understandable to have a 1-2 year review process.  However, we now live in an era of online submissions.  Yet the time-line of many journals is still arduously slow and needlessly long.

Second, mid-tier and low-tier journals often find themselves scrambling to find good reviewers for papers.  I've had many colleagues tell me about a paper getting in with only a single reviewer (for non-scientists, the norm is 2-3 reviewers).  In many of these cases there is a trend for these to also be out-sourced to graduate students or post-docs.

Now don't get me wrong, this is an incredible training opportunity (and one that I am thankful to have started early in my career).  However, without good oversight of an out-sourced review by the principle investigator who was originally solicited, a rookie mistake can kill a reasonably good study's chance of acceptance at a journal.  This chance is worsened when the rookie is the only reviewer of a manuscript.

Finally the critiques are generally random, arbitrary and sometimes not related to the manuscript itself at all.  Sadly, it is fairly common these days for a paper to get rejected because of more global disagreements in the field rather than the quality of the study itself.  We work in a large field with many big theoretical disagreements.  As a result, all of us at one time or another have been collateral damage in a fight amongst the larger egos in our field.  Yet it only serves to stifle communication of ideas and results, rather than evaluating the true merit of any individual study.

The Good

But contrary to this (and the arguments raised by Kravitz & Baker, as well as many other scientists), there are many times when the system actually works well.  Contrast the previous story with one communicated by a friend working here in Pittsburgh (paraphrased here and not her actual quote).
I submitted a paper to Journal Z and after a month I got comments back that were very positive and indicated a strong willingness to accept the paper.  The reviewers were very collegial, but brought up an ideal control experiment that would bridge my work with another theory as well as making a better overall argument for my hypothesis.  The editor had also read the paper and provided his own comments.  He coalesced the reviewers comments into a specific set of recommendations and even offered recommendations for how to modify the design of the control experiment so as to make it a tighter/cleaner study.  In the end, I felt like they were all invested in pushing the project forward.
In my opinion this is a textbook example of how the process should work in the first place: fast turn around, constructive reviews and a well managed pipeline focused almost exclusively on the details of the study at hand.  So while the system has it's flaws, it's not broken everywhere.

So What Gives?

Now there are two big differences between the Bad Story and the Good Story.  The journals talked about in the Bad are all from neuroscience journals, while the Good is a story from a psychology journal.  So differences in fields may play a key role.

But I think there's something deeper at play here.  Specifically differences in editorial oversight.

Let's face it, most of us can agree that in many cases, editors at some journals appear to be falling asleep on the job.  But let's not be too harsh on this judgement. I can understand why this happens in many cases.

Big publishing houses like Elsevier want to make as much money on free labor as possible.  So in many cases, not only are professional scientists giving free professional labor as reviewers, we're also serving as under-compensated editors. Editors are overworked, under appreciated, and have little time to manage their own research careers, let alone supervise the careers of others through the editorial process.

In a context like this, I can understand the sub-optimal feedback and oversight in the editorial process.

But what about higher impact journals with full-time professional editors? Well in my experience, those are just as poorly managed.  After numerous experiences submitting to journals with full-time and professional editors, I have never received the type of constructive feedback and oversight like what happened in the Good Story above.  In fact, I don't really believe that many editors at these journals even read the articles at all.

Of course, editorial oversight is just one (albeit significant) part of the problem.  Another part stems with the demand for reviews as well.  Reviewers are under increasing pressure to turn around reviews in faster timelines, often with little time to really digest any particular study.  This is on top of the increased quantity of reviews required to keep pace with the increased number of journals.

Scientists push to get out as many papers as they can and this increased volume of manuscripts requires even more reviewers.  Eventually the demand gets so great that quality review quality drops precipitously.

The military has a word for this: "clusterfuck."

The Unasked Question

So this is the state of our current publishing process in the field of cognitive neuroscience.  It's driven a lot of professional scientists to push for a change.  To fix the broken pipeline.

Many argue that we need to overhaul the entire process itself.  I view this opinion fondly, although I might hesitate to say that I am a "proponent".  Some argue for a complete open access model with unblinded reviews.  Others want a centralized database for submitting unreviewed manuscripts in order to crowd-source the evaluation of merit of individual studies.

If you ask five cognitive neuroscientists their opinion on the current publishing process, you'll get ten different recommendations.

But there's one question I think we're all neglecting and it's the most important question of all if we are going to try and address this so-called crisis.


What the hell do we want from the publication process?

Do we want to go back to the more traditional view where papers are a completed treatise on research topic?  Decades ago this was the central view of what a scientific paper should be.  Researchers would spend years investigating a single question, run all possible control experiments (dozens or more), and carefully construct a single paper after all those years that eliminates all other possible alternative explanations for the effect of interest.  These papers would be long, carefully constructed, and a nearly definitive treatise on a research topic.

This is essentially the tortoise model of scientific advancement.  The time-scale of publishing is very long, but also very reliable and consistent.  Here the key measure of a research program's efficacy is the long-term citation record of a given paper.  You might only publish one empirical article every few years, but it would be a definitive work.

The alternative is the hare model of scientific advancement.  Here publications should reflect a snap-shot of a research program's status.  Only one or two experiments are reported in a paper (although thoroughly analyzed) and repeated publications all tie together over time to tell a larger story.  This is a very accelerated model of scientific progress.  Articles are less a treatise on a core theoretical question and more of a "status-update" of a research program.

Over the last couple of decades, the push in cognitive neuroscience (and other fields) is to move away from the slower quality-focused model to the faster quantity-based model.  There are many reasons for this, but you can primarily thank the increasingly heated "publish-or-perish" academic culture for this change.

Right now we are, unfortunately, stuck in a hybrid paradigm where we have the expectations of the tortoise model with the demands of the hare model.  In my opinion, this bipolar paradigm is what is driving researchers crazy these days.

So I return to my original question.  What do we want from scientific publishing?  We can't be both a tortoise model or the hare model?  We can't have both (or realistically we can't have the mechanics of one and the expectations of the other).

Unfortunately, there is no good answer to this.  I see equally valid pro's and con's to either.  Also, this is a decision that has profound implications well beyond how we structure the peer-review process.  Departments and universities will have to completely revise how they evaluate the progress of faculty and students.  Similarly so for granting agencies.

However, these changes are necessary.  It's just a matter of deciding what the expectations need to be.

Therefore answering this question comes down to us talking together as a field.  We need to decide which model we want to use and commit to it (with all the implications that follow).  Until we make this decision, we can propose as many new publishing systems as we want, but they'll end up being nothing more than intellectual thought experiments that describes the world we wish could be, rather than real ways to fix the world that we have.

Saturday, December 10, 2011

Tales From The Science Trenches: The problem of journal addiction


Note: Over the next few months I'll be doing a series of posts critiquing modern peer-review process.  As part of this I'd like to collect stories from other scientists on their experiences trying to get papers through peer-review.  Good or bad, if you have a story you'd like to share, please email me (timothyv[at]gmail[dot]com) or put them in the comments section and I'll post them as I see them.  

Today's guest post comes from Joern Diedrichsen who is one of the smartest, most creative scientists that I know.  He studies motor control at University College London and has a provocative take on the pains of the current peer-review process and the addictive mentality that keeps bringing us back for more.

The problem of journal addiction

"Let’s admit it, we are all suckers for glossy journals. Nature, Science, Neuron, Nature Neuroscience... oh, how we puff up our chest when we have a paper accepted in a high place! How we strut around and announce in talks: “our new paper in xxx shows…”. And how deflated, angry, and bitter are we after a rejection.  How we hate the reviewers and the editors. "Ignorant bastards just do not understand anything."

And of course, we are correct. Our papers are misinterpreted, rejected for selfish reasons, or because of plain ignorance. And the editors do not have the spine to stand up and tell reviewers how petty they are.  And the next time WE get asked to review a paper for this journal – which is really not as good as our rejected paper – we’ll show them! The review request lands in our inbox and we metamorphose into the dreaded reviewer 2. Or 3 (depending on how many hours past lunch it is).

Of course we could boycott the whole system. Retreat to a small island. Only send papers (no matter how good) to PLOSone or Frontiers. But a month later, when the wounds have healed, we find ourselves preparing a cover letter for another submission to one of the hated journals. Talk about addiction.

Do we really think that the title of the journal we publish in means this much? Considering the degree to which professional editors are slaves to fashion, and how random the review process is, we really shouldn’t. I think some of my weaker papers have been published in “better” journals - and vice versa. There is a slight positive correlation – but not very high.  Many of the papers that in retrospect are important, get cited, and have impact on the field are in 2nd-tier journals. But then again, in terms of careers, candidate selection, and funding decisions, we all like to rely on the fast heuristic of the impact factor, not on how important we think the paper is.

So, rather than go by the journal name, if we all would READ the actual papers, see how clear, compelling and novel the results really are, we should be able to break the yoke that editors and reviewers hold over us, right? So, why are we not online every week making sure that good papers in 2nd tier journals get their well-earned exposure by posting online evaluations on journal websites? Why do the online debates in PLOS Comp Biology often only consist of statements such as “The reference section is missing a crucial reference: My article, 2011”? Why does Faculty of 1000 seem to be struggling in terms of relevance and in getting enough submissions? I guess we are simply too busy writing angry reviews, rewriting our own papers for the next glossy journal, or arguing with journal editors. And trust me, life as an editor is not rosy either. Talk about a thankless job.

Currently, I do not see a good way out. Do we really think that low-threshold mass-journals like Frontiers and PLOSone are the solution? It seems there is just too much stuff out there, and post-hoc online evaluations by people in the field seem not to work very well. So maybe the traditional peer-review and tiered journal system is – like western democracy and capitalism – the lesser of the evils…. But maybe we can start to not reject because we feel the paper is too novel, doesn’t cite us enough, or infringes on our turf? Maybe we should stop pushing papers by friends in high profile journals for political gain? Maybe we should stop evaluating people based on where they publish and turn our attention to the science they produce instead? Perhaps teach our students some integrity and honesty?

No time for that…. I need to fine-tune that cover letter…"

Monday, December 5, 2011

Tales From The Science Trenches: Case of the missing editor


Note: Over the next few months I'll be doing a series of posts critiquing modern peer-review process.  As part of this I'd like to collect stories from other scientists on their experiences trying to get papers through peer-review.  Good or bad, if you have a story you'd like to share, please email me (timothyv[at]gmail[dot]com) or put them in the comments section and I'll post them as I see them.  

Almost immediately after my post yesterday a friend emailed me to share her story.  I think it sets another good case for why proper editorial management is so important.

If you or a colleague have a similar story or even a positive one about the submission process, please email me your tale.

Case of the Missing Editor

"Hi Tim,

I submitted a manuscript to the International Journal of [redacted] on March 7.  This journal doesn’t have an online submission site, so authors are supposed to email (or paper mail) the submission to the editor.  After several attempts to email the editor with the email address listed on the journal website and on his university web page, none of the emails went through. I also didn’t get a response to an email I sent to someone else on the editorial board looking for the editor’s email address.

So I contacted someone in the office I work in to see if they had ideas about where to go from there.  It turned out the email addresses listed for the editor were incorrect, so they gave me the right one.  I sent in the manuscript, it seemed to go through, but I never received acknowledgement of receipt.  I forgot about it for a while, and figured I’d hear from them with a decision in a few months.

At the end of July, I sent an email to the editor asking for acknowledgement of receipt and information on when I might expect to hear a decision.  He never responded.  At the end of August, I emailed an associate editor at the journal who happened to be at the same university, and asked if he could help me out with getting in contact with the editor about my questions.  He responded right away saying he would get in contact with the editor for me, but I never heard anything from him after that.

At the beginning of September, my advisor emailed the editor asking about my manuscript and another of his that he had sent in May.  The editor responded within a day, saying he received the manuscripts and sent them out for review, and he has a new email address that we should use.

We heard nothing back by the end of October, so at that point I sent another email inquiring about both manuscripts that are under review.  Three weeks later, he responded and apologized for the 'long delay' in his response, saying that he has had a 'high workload.'  He said 'I will be able to inform you about a decision very soon now. You will hear from me before December 15.'

And so we wait.

I’ve considered (many times) pulling my manuscript from the journal and submitting it somewhere else, but haven’t because the topic of my paper just wouldn’t fit well at very many journals, and all of my other journal options have lengthy (2-3 year) waits between acceptance and publication.  Needless to say, I don’t plan on ever submitting to this journal again, at least as long as this person remains the editor."

Sunday, December 4, 2011

Tales From The Science Trenches: An open-letter to Frontiers in Human Neuroscience

Note: Over the next few months I'll be doing a series of posts critiquing modern peer-review process.  As part of this I'd like to collect stories from other scientists on their experiences trying to get papers through peer-review.  Good or bad, if you have a story you'd like to share, please email me (timothyv[at]gmail[dot]com) or put them in the comments section and I'll post them as I see them.  

In an ideal sense, the peer-review process is designed to provide useful critiques of scientific manuscripts so that the end result has minimal errors and justified conclusions.

Unfortunately, personal biases, poor editorial oversight and general abuse of the review process can sometimes impair communication of scientific results.  What is described below is one example of the flaws in the process that are sometimes experienced by those trying to publish scientific results.

Recently my colleagues and I tried submitting a manuscript to the journal Frontiers in Human Neuroscience.  Frontier is an open access set of journals that prides itself for a rapid turn-around (i.e., fast review cycles) and a simplified peer-review process focused primarily on methodological validity.  

The manuscript we submitted was a study on the brain activation changes that occur with increasing obesity.   The paper had already been bounced around to several other journals before being sent to Frontiers.  As sometimes happens, the same anonymous reviewer followed us from journal to journal providing the same general (and in our opinion incorrect) critiques of the manuscript.

Now for those of you outside the process, it's generally considered bad manners to agree to review a manuscript that you have already critiqued at another journal.  The logic being that you can't provide an unbiased review of the manuscript because you've already judged it previously.

Unfortunately, this particular reviewer keeps agreeing to critique the manuscript while letting his previous judgements color his critique of our manuscript.  What's worse is that he (I'm assuming the gender because I have a good idea who it is) isn't interested in making helpful criticisms that could expand or fix the paper.  You can see for yourself in the linked documents below.

So we submitted our work to Frontiers and this reviewer followed us there.  He gave his usual critique, ignoring many of the changes we that made to address these concerns.  We then spent a couple of months further revising the manuscript and running control analyses.   Once the revisions were submitted to the journal, this hostile referee immediately withdrew his review (again, rather than address our arguments) while the only other referee signed off on our changes as being sufficient for publication.

Then we waited 8 weeks with no word from Frontiers.  Again, for those of you non-scientists this is a pretty long time to wait for an editorial decision after the reviewers had submitted their responses.  Emails to the editor were ignored and the status remained unchanged.

It turns out that the original editor had retired after we resubmitted our manuscript.  Instead of seeing the submission through to completion (or not agreeing to be an editor in the first place), he simply withdrew as well.  It appears that it took Frontiers almost to figure this out.  Once a new editor was assigned, this individual (Dr. HH in the open letter below) made an executive decision to reject the manuscript based only on the withdrawn review.  He completely ignored our replies and made no mention as to why our carefully constructed retort was incorrect.  

In the end the new editor gave us his subjective opinion, based on the interpretations of an admittedly biased reviewer (he admitted he had reviewed our work at other journals) who withdrew from the review process instead of replying to our arguments. 

Not exactly the thorough, intellectual conversation that the peer-review process plays itself to be.

Had this been my first experience like this, I would let it go.  Disappointment comes with being a scientist.  However, it is sad to say that this isn't an unusual circumstance in modern scientific publishing these days.

So what can I do besides submitting to another journal?  Well I've taken the step of delivering an open letter to the editors at Frontiers in Human Neuroscience to outline my frustrations.  You can read it here or see it below.  

"Why make it an open letter?" you may ask.  I'm not doing it to be vindictive.  I'm doing it in the spirit of open access.  With increasing demand to open up access to articles, I believe it's imperative to also open up access to critiques and criticisms of the review process itself.   We don't have a formal repository of abuses of the peer-review process (i.e., a Yelp of scientific publishing to know editorial, reviewer, or journalistic biases before submitting manuscripts).  Often young scientists only find these out through trial-and-error when trying to publish their results.

Shedding light on the flaws of the peer-review process with your colleagues is the only way to start addressing these problems. Until we have a formal system for bringing these experiences to light, I'd like to start serving that role.   If you have an experience you'd like to share about your own experiences that highlight either errors/flaws or cases where it worked precisely how you think it should, please send them along.  I'll post your stories here on my blog as they come along and respect your privacy.

As of the time of this post, the Frontiers editors have not replied to my concerns laid out in the letter.  I'm not holding my breath.


Epilogue: For those of you interested in what a hostile review looks like, you can read the entire critique from the problematic reviewer and our reply to their critique here since Frontiers won't likely be releasing this anytime soon.


Open letter to the editors of Frontiers in Human Neuroscience:

Dr. HH,

Note: In the letter that follows I speak only for myself and not my fellow co-authors. I will be making this letter open to my scientific colleagues so they can understand what they can expect from Frontiers.

I am extremely displeased with the way in which Frontiers has handled the review of this manuscript. Not only has it been mishandled and delayed due to lack of foresight and administration by the editorial staff, but the reasoning behind the final decision rests on a tautological adherence to the reputation of a reviewer who withdrew from the process altogether without addressing the merits of our arguments. At no place in the decision were our responses acknowledged and shown to be incorrect.

My specific complaints include:

1) Our original editor, Dr. NC removed himself as editor in the middle of the review process instead of either seeing the submission through to completion or not accepting it if he knew he was stepping down.  Dr. NC ignored several email requests from our group asking about the status of the manuscript after we replied to the initial concerns.  We received no correspondence from Frontiers for more than two months and no reply from Dr. NC altogether.

2) It took the Frontiers office almost 8 weeks to revisit our manuscript after the original reviewers had either withdrawn (Reviewer 1) or signed off (Reviewer 2) on our changes. 

3) The editorial board chose to ignore the rude and unprofessional tone of Reviewer 1 (who even admitted that he has been a hostile reviewer of this manuscript at previous journals and yet did not decline the invitation to review).  This reviewer did not provide constructive critiques that could improve the quality of the study. Instead they made rude, accusatory and unprofessional statements that were provably false.  At no point did the editorial board intervene in this review. Further, the editorial decision completely ignored the second reviewer’s positive comments about the manuscript (some of which directly conflicted with the first reviewer).

4) Most insulting of all, rather than find an additional reviewer to replace the hostile referee who withdrew from the review, you made an executive decision based solely on the opinions of the withdrawn review! The arguments laid out in our reply were outright ignored, as was the fact that the reviewer had been withdrawn from the review process. If the reviewer had felt merit in their argument they would have further replied to our revisions.  Instead they chose to simply withdraw from the discussion without providing critical feedback.

5) The basis of your executive decision was based solely on several demonstrably false statements that we laid out in our response and we again describe here.  These include:

a) "One expert in the field of this paper had serious concerns about the design and interpretation of this study. The authors' responses did not alleviate the reviewer's concerns." 

Reply: This comment comes from a withdrawn review so it is unclear whether we actually alleviated the concerns of the reviewer.  However, if the reviewer contacted Frontiers after our reply and did not address our carefully laid out arguments, then this puts us in a grossly unfair position since there is no formal critique with which to make a response. 

b) "In particular, the reviewer was concerned that the 3 groups (normal, overweight, and obese) had major age differences, that these age differences may explain some of the results, and thought that the analysis attempting to factor age out is insufficient. The associate editor and I agree that considering the small number of subjects indeed the age differences cannot be overlooked." 

Reply: This argument is specious and wholly unsubstantiated on several levels.  First, as we carefully lay out in our reply, it is the Overweight group that is slightly older than the Normal and Obese groups.  In fact the ages of the Normal and Obese groups are statistically identical.  Yet our neural effects are Normal < Overweight < Obese in the categorical analysis (specifically Normal < Obese) and strictly linear in the parametric regression analysis.  If age was the driving factor our categorical effect pattern would be Normal < Obese < Overweight and have an inverted-U characteristic in the parametric analysis (Figure 7a).  Therefore this argument fails the simple logic test.

Second, the reviewer's belief that using nuisance regressors is an invalid way of controlling for non-specific effects goes against basic statistical theory.  The argument of accounted variance in nested regression models is the fundamental theory of structural equation modeling and mediation analyses.  Yet, the reviewer mis-quotes one article in a psychiatry journal to make their case.  We clearly demonstrated in the reply that BMI and age are not correlated and therefore (even according to the article cited by the withdrawn reviewer) age can be treated as a valid covariate for the neural effects.

Finally, an N=29 is NOT a small sample-size for conventional fMRI study.  There might be a case for it to under-power the categorical analysis, but in the parametric regression analyses (which supports the categorical findings) this is sufficient even for the conservative sample size recommended by Thirion et al. 2007 which the reviewer himself cites.  

At no stage has the withdrawn reviewer or editor pointed out why any of our arguments are incorrect.  They are simply disregarded without reply.

c) "Moreover, the mere fact that such conspicuous age difference were found, suggests some non-random sampling, which suggests that other factors would covary with BMI. In fact, overweight and especially morbid obesity are associated with numerous factors which may be of importance (e.g. socio-economic factors, health problems, not to speak of comfort in lying in the scanner), but the paper unfortunately does not provide clinical or demographic data on the subjects."

Reply: We fail to see the logic in the argument of "non-random sampling." In fact, with random sampling you will get some inconsistencies between groups.  Equal demographics across groups is only achieved through NON-RANDOM sampling.  Nonetheless, as we carefully laid out in our reply, there is no logical way that age can explain our effects.  As for the other covariates, the slippery slope argument to control for an ever increasing number of factors is a needless "torpedo" argument that can be lodged against virtually any between-group study.  This is a proof of concept study of inhibitory control deficits in obesity.  Once an effect is confirmed, further work can be done to elucidate mechanisms and causes.  But you have to know what you're looking for first.  If we followed your logic to its conclusion, no study could be published until all explanatory factors can be fully accounted for.  For example, differences between younger and older adults could be due to lack of comfort in the MRI environment in older adults.  Differences between borderline personality disorder and controls could be due to emotional reactions to the MRI environment.  Differences between schizophrenics and controls could be due to discomfort and irritation lying in a tight enclosed space.  In short, any between-subject study (including many of those published by the editors of this journal) could be said to have the same limitations as our study.  This in no way undermines studies of age, schizophrenia, borderline personality disorder, autism, or any other disease.  Instead, it emphasizes that despite these limitations in between-group comparisons there can be important information gained.  Similarly, our study on obesity is not immune to these issues, but it does not mean that important information on brain health in obesity could not be gleaned from this work.

d) "Another issue is the fact that since the behavioral results did not in fact confirm the prediction of the authors (more inhibitory problems with obesity), the paper relies heavily on reverse inference – that is, on drawing conclusions from assumptions on the cognitive roles of specific activated brain regions."

Reply: In many brain imaging studies, behavioral effects are weaker or not present where evoked brain dynamics are clearly visible.  In fact, the overall slowing of response times across groups is behavioral evidence for our argument that in higher BMI subjects, it requires more processing power to get the same behavioral output.  Thus all responses would be slower.  Again, this suggests that the manuscript was not clearly read since we make this point very clear in the text.

Given this rude and unprofessional experience, I will request that you no longer ask me to be a reviewer on future manuscripts since I do not wish to participate in such a flawed and obviously biased system.  I will also not be sending any new manuscripts to Frontiers in the foreseeable future. 

Sincerely,
Timothy Verstynen Ph.D.
Research Associate
Department of Psychology
Learning Research and Development Center
University of Pittsburgh
Pittsburgh, PA 15260