john hawks weblog

paleoanthropology, genetics and evolution

metascience

  • Scholarship and experience outside the academy

    Thu, 2013-02-07 11:27 -- John Hawks

    The Wall Street Journal has an inspiring story of a hairdresser who turned her curiosity about Roman hairstyles into novel scholarship: "On Pins and Needles: Stylist Turns Ancient Hairdo Debate on Its Head".

    In 2007, she sent her findings to the Journal of Roman Archaeology. "It's amazing how much chutzpah you have when you have no idea what you're doing," she says. "I don't write scholarly material. I'm a hairdresser."

    John Humphrey, the journal's editor, was intrigued. "I could tell even from the first version that it was a very serious piece of experimental archaeology which no scholar who was not a hairdresser—in other words, no scholar—would have been able to write," he says.

    Ms. Stephens' article was edited and published in 2008, under the headline "Ancient Roman Hairdressing: On (Hair)Pins and Needles." The only other article by a nonarchaeologist that Mr. Humphrey can recall publishing in the journal's 25-year history was written by a soldier who had discovered an unknown Roman fort in Iraq.

    There is so much room in archaeology for people with deep subject knowledge, but not necessarily archaeological training, to make original contributions. Last night's NOVA episode, with a group of people trying to reconstruct Egyptian chariots, is another case where an ancient tradition can only be examined by those with insights about the subject beyond the historical and archaeological record -- in this instance, how to get a team of horses to work together using bridles, bits and yokes that no one had seen used in more than 2000 years.

    One of the great potential strengths of online media and open access is to enable this kind of participation by non-academicians. I'm hoping to capture some of that enthusiasm and knowledge in an upcoming project.

    (via Charles Mann)

  • Privacy of genetic research participants

    Thu, 2013-02-07 00:01 -- John Hawks

    Misha Angrist, writing in Nature News comments ("Genetic privacy needs a more nuanced approach") on the recent study that demonstrated the possibility of finding the true identities of research participants who provided anonymized DNA samples [1]. Adding some context to the study, Angrist discusses the current federal privacy regime, and the way that genetic research relies upon the anonymizing techniques now shown to be insecure:

    Although genetic data are considered protected health information under the HIPAA, many of the protections disappear when the information is ‘de-identified’ — that is, the 18 identifiers specified in the act (including names, addresses, birthdates and the like) are removed. And because genetic information is not one of those 18 identifiers, it does not need to be removed from health records to follow the letter of HIPAA privacy. If researchers do not know who you are, and cannot easily find out, then their obligations to you diminish by orders of magnitude. Furthermore, their protocols are less likely to need full review by an institutional review board; their grant applications become less onerous; and their technology costs go down.

    ...What if the absence of the 18 identifiers isn’t enough to protect someone’s identity?

    If genotyping becomes sufficiently cheap, and personal information sufficiently interlinked within corporate or government databases, then personal identification of genetic samples will be ubiquitous. The constraint on ubiquitous identification is not the cost of genotyping, which is already cheap enough for anyone motivated to identify a sample. The remaining constraint is the interlinking of databases.


    References

  • Link parade

    Fri, 2012-10-19 22:02 -- John Hawks

    Here are some stories to entertain, amuse, or depress:

    Bryan Gardiner in Wired Science profiles professional glassblowers who are dedicated to making anatomical models: "Heart of Glass: The Art of Medical Models". The products are beautiful and educational in a way computer models cannot match.


    "The detection of interstellar boron sulfide" blog has "A Motivational Correspondance" from a department's astronomy faculty to their graduate students. I can't believe that it's not a parody (although it is presented as serious) because the whole thing would be such a fat target for a lawsuit.

    First, while some students are clearly putting their hearts and souls into their research, and spending the hours at the office or lab that are required, others are not. We have received some questions about how many hours a graduate student is expected to work. There is no easy answer, as what matters is your productivity, particularly in the form of good scientific papers. However, if you informally canvass the faculty (those people for whose jobs you came here to train), most will tell you that they worked 80-100 hours/week in graduate school. No one told us to work those hours, but we enjoyed what we were doing enough to want to do so. We were almost always at the office, including at night and on weekends. Nowadays, with the internet, it is fine to work from home sometimes, but you still miss out on learning from and forming collaborations with other graduate students when everyone does not work in the same place at the same time.


    From Nature News: "Rejection improves eventual impact of manuscripts". Apparently, articles average more citations when they get bumped from one journal and published in a different journal, irrespective of whether they get published in a higher-impact or lower-impact journal. For all those who have been tweeting the link, do note that the study has a fairly obvious bias: papers that get bumped and then never published aren't counted...


    The Archaeobotanist has a detailed critique of the recent rice domestication paper: "A genome map that is not a map of origins (Rice Genetics Watch returns)". Many of the issues that are problematic in identifying "rice origins" are also problems for identifying human migrations:

    The authors have concluded the the closest wild ancestors to cultivated rice are living wild populations in the Pearl River basin. The problem is that rice was domesticated not from living population but from past populations almost certainly from regions where wild rice is no extinct (technically, we would say, extirpated). This study demonstrated that big science and lots of resources do not inevitably produce answers, but that nuanced analysis and critical thinking, and in this case some knowledge of Chinese history, are necessary to direct analyses.

    The post's final paragraph discusses the use of archaeological evidence as a reality check on the genetics. I don't have any commitment on rice domestication, but the arguments presented here must be understood.


    Clay Shirky in Poynter discusses the media's loss of "trust": "Shirky: ‘We are indeed less willing to agree on what constitutes truth’".

    Consider three acts of mainstream media malfeasance unmasked by outsiders: Philip Elmer-DeWitt’s 1995 Time magazine cover story that relied on faked data; CBS News’s 2004 accusations against the President based on forged National Guard memos; and Jonah Lehrer’s 2011 recycling and plagiarism in work he did for the New Yorker and Wired. In all three cases, the ethical lapses were committed by mainstream journalists and unmasked by outsiders working on the Internet, but with very different responses by the institutions that initially published the erroneous material.

    I don't endorse Shirky's conclusions but the essay is thought-provoking.


    Time magazine's "Moneyland" site has an article by Dan Kadlec: "Why College May Be Totally Free Within 10 Years". The more interesting exchange occurs near the end, where he quotes former Harvard president Lawrence Summers:

    There is a reason that people pay a lot of money to go to an event like the Super Bowl when it is free on TV, Summers offers. They get more out of it by being present. Something similar is true of an on-campus education, where you may attend extra-curricular events and engage more fully with faculty and other students.

    "Unbundling" college -- in the sense of unbundling a cable TV package -- is an interesting analogy raised in the article. I have heard a high-level college administrator make the same argument, that our students enjoy their campus experience and don't want to finish college sooner. I couldn't help but respond to this argument on the spot: If we allow students to spend less time on campus, we can open the educational experience to more students, including many who can't afford to spend four years marking time.


    John T. Tierney in The Atlantic: "AP Classes Are a Scam".

    The traditional monetary argument for AP courses -- that they can enable an ambitious and hardworking student to avoid a semester or even a year of college tuition through the early accumulation of credits -- often no longer holds. Increasingly, students don't receive college credit for high scores on AP courses; they simply are allowed to opt out of the introductory sequence in a major. And more and more students say that's a bad idea, and that they're better off taking their department's courses.

    I have some experience working with the new AP biology guidelines, which were formulated following the "Vision and Change" document from the National Academies, and is guiding biology education reform at both secondary and undergraduate levels. So I don't agree with Tierney's criticisms about the "stultification" of the curriculum. But it is clear that AP courses are not treated with any consistency by universities, and results in other disciplines vary widely.

  • Why do scientists follow fads instead of acting like proper skeptics?

    Tue, 2012-10-09 00:07 -- John Hawks

    I had a question tonight from a reader who is a student at a university somewhere else. Without going into the details, this student was in a seminar where her colleagues were all espousing a position that has been for some time a fad in paleoanthropology. My correspondent did exactly what any good student should do: she found the relevant literature, which seemed to contradict the faddish seminarians.

    What to do? Well, I mean besides flashing the hawk signal.

    How could these seemingly earnest students have slavishly adopted the fad as their own? Did some professor mislead them?

    I thought of that question when I was reading a post by Jeremy Fox: "Can the phylogenetic community ecology bandwagon be stopped or steered? A case study of contrarian ecology". Fox is writing about a particular branch of ecology, in which a growing group of researchers have been using phylogenetic methods to study the factors that determine the species composition of ecological communities. For the details of the methodology and substance of Fox's critique, you'll have to read the whole post.

    The interesting part is the literature analysis. Fox notes the publication two years ago of a strong critique of the fad methodology, published in the leading field-specific journal. It makes a unique case study in citation practices:

    Even if you don’t agree with M&L’s critique, I hope you’ll agree that this is an interesting case study of a contrarian attempt to stop or steer an ongoing bandwagon. You have a situation where lots of people are pursuing a particular question using a particular approach. But then someone well-known publishes a serious, easy-to-understand critique of that approach in a very prominent venue, and suggests an alternative approach. What happens next?

    He discovers that much research plodded along as if no critique had ever been published. The most common kind of citation for the critique is in papers about totally different aspects of ecology, citing the paper as a review. Specialists within the relatively narrow area of the critique have shunted it aside. As Fox concludes, a paper can't stop a bandwagon. It can't even redirect one.

    This isn't entirely a fair comparison, considering that research already underway may be hard to alter in response to critical research. Doubtless the researchers on this bandwagon can defend their preferred approach. Still, they should cite and take seriously a prominent methodological criticism.

    As for my correspondent, I wrote back:

    The quote you pulled is a very good one. I'm afraid you've discovered an inconvenient truth about academics: very few of them are good scholars who read and take seriously the primary literature.

    Scientists are supposed to act like proper skeptics, but certain ideas seem to run away with them. I think that failure to read is the biggest reason why bandwagons get going. I've seen it so many times: Instead of engaging with a critical paper, an entire crowd of scientists cite some lame -- and often wrong -- secondary description of the paper. They take the incorrect description because it's short, because it accords with their prior conceptions, and most importantly because reviewers don't demand accuracy.

    Oh, about that hawk signal -- one of my other readers today noticed that I am also a superhero. No, really -- if you're a long-time reader, you will no doubt remember:

    Yep, I deliver a mighty lecture, an' pack a mighty punch.

    UPDATE (2012-10-09): Jeremy Fox writes:

    Just saw your discussion of my recent post on the phylogenetic community ecology bandwagon and pushback against it. Glad you liked the post. I don't know that I'm quite as pessimistic as you about the effect Mayfield and Levine, or anyone, to affect the ultimate course of that bandwagon. I think it's still fairly early days, and it's promising that some folks are already publishing papers based on Mayfield & Levine's ideas.

    I thought you might be interested in a recent paper that a commenter on the post pointed out to me, and which I'm embarrassed to admit I hadn't seen. It's a review of 17 high profile papers that were subsequently rebutted, asking how often the rebuttals were cited and how they affected the citation patterns of the rebutted papers.

    http://www.esajournals.org/doi/pdf/10.1890/ES10-00142.1 (it's open-access)

    If anything, the review suggests that Mayfield and Levine is an unusually *high impact* rebuttal. Most rebuttals seem to have very little impact. Which is indeed a rather depressing conclusion. I'm planning a follow-up post on this paper as soon as I can carve out some time.

    Synopsis: 
    Superhero John Hawks investigates scientific fads.
  • "Productively stupid"

    Mon, 2012-10-08 09:20 -- John Hawks

    I was passed an essay today from 2008, by Martin Schwartz in the Journal of Cell Science: "The importance of stupidity in scientific research" [1].

    Second, we don’t do a good enough job of teaching our students how to be productively stupid – that is, if we don’t feel stupid it means we’re not really trying. I’m not talking about ‘relative stupidity’, in which the other students in the class actually read the material, think about it and ace the exam, whereas you don’t. I’m also not talking about bright people who might be working in areas that don’t match their talents. Science involves confronting our ‘absolute stupidity’. That kind of stupidity is an existential fact, inherent in our efforts to push our way into the unknown. Preliminary and thesis exams have the right idea when the faculty committee pushes until the student starts getting the answers wrong or gives up and says, ‘I don’t know’. The point of the exam isn’t to see if the student gets all the answers right. If they do, it’s the faculty who failed the exam. The point is to identify the student’s weaknesses, partly to see where they need to invest some effort and partly to see whether the student’s knowledge fails at a sufficiently high level that they are ready to take on a research project.

    The essay is tone-deaf in interesting ways. Schwartz begins by recounting a chance meeting with a female former classmate, now a successful attorney, who dropped out of graduate school because "after a couple of years of feeling stupid every day, she was ready to do something else." Instead of investigating further how her experience as a woman might differ from his, Schwartz reflects that everyone should feel stupid in graduate school. Likewise, he makes a great show of the overwhelming difficulty of science, without describing the support of colleagues. He describes, in other words, a certain kind of ideal that most science careers do not (and probably should not) match.


    References

  • Immediate publishing

    Sat, 2012-09-01 09:16 -- John Hawks

    Michael Eisen: "The Glacial Pace of Change in Scientific Publishing".

    Consider that most papers submitted to journals last November 26th have still not been published. That’s not a random date – it happens to be the day NASA launched an Atlas rocket carrying the Mars Scientific Laboratory from Cape Canaveral.

    While, on Earth, scientific papers were languishing in editorial purgatory and peer review, bouncing back and forth while authors attempted to cater to some reviewer’s whim, maybe went to another journal, and then sat around in production for months while the awaited online publication, an SUV-sized robot made its way to another planet, landed with pinpoint accuracy on the surface and started beaming back pictures.

    NASA 1. Publishing 0.

    Eisen writes forcefully in favor of immediate publishing. I think we need a culture change first. Most people, including most scientists, assume that peer review is something that it isn't. At the same time, most people, including most scientists, assume that they're better writers than they are. We have an editing problem. We need to accept that no paper is final, that versioning should be transparent, and that the literature on a research question should be concentrated so that it can be critically evaluated, rather than dispersed across dozens or hundreds of separate journals.

  • "We find it hard to see what publication would achieve at this stage"

    Mon, 2012-08-27 21:05 -- John Hawks

    Theoretical physicist Terry Rudolph shares a story about preprints and the editorial process at a top science journal: "Guest Post: Terry Rudolph on Nature versus Nurture". In short, there was no problem posting a potentially interesting physics paper on the arXiv, and then getting it reviewed by the journal. But when the authors posted a follow-up preprint, it sabotaged the "interest" of their first submission:

    While it mildly rankles that my own participation in that “wide debate” was curbed by the blurry lines of their own policies, I’m not particularly upset by the episode – perhaps indicative of my well documented own laissez-faire attitude to publishing, but perhaps because I know the result is ultimately more important than the journal it appears in.

    The ironic part is that Nature wrung the news value out of the first preprint with coverage from its news division. Rudolph's story gives the appearance that the journal was happy to promote the work before it accepted the paper, but later claimed it was not newsworthy.

    I don't really have any problem with journals pursuing papers that are newsworthy. My problem is that these journals make papers appear newsworthy by their control of information flow. I've said it before ("The costs of publication delays"): We need to eliminate the myth that publication itself is a newsworthy event.

  • The grantest generation

    Sat, 2012-08-25 12:21 -- John Hawks

    A sobering chart:

    Ages of NIH grantees versus medical faculty ages 1980 and 2010

    The red lines are the distribution of ages of medical school faculties, in 1980 and 2010; the bars are the distribution of NIH grant recipient ages. Both increased markedly in the 30-year period, with a larger and larger gap between them. I pulled this chart from a YouTube animation that shows the figures in many intervening years. It's a slow march toward older and older grant awards, when the proportion of 55-year-old grantees has doubled, while the proportion of 39-year-old grantees has halved.

    Plus a totally new category: the septuagenerian grantee.

    I wonder how many of the 65-year-old grantees of 2010 were part of the large crop of 35-year-old grantees in 1980. A fortunate generation of research scientists.

    UPDATE (2012-08-26): A reader writes with the story of a scientist who kept the same R01 grant for 28 years, renewing competitively in every cycle, but without any other funding worries until he decided to retire. If you watch the linked video, you'll see a "bump" of grants that ages upward for more than fifteen years. If grants were not renewable, of course, this bump would have smoothed itself out over the course of a grant cycle or two. Instead, we see how a single NIH budget bump was carried forward by a lucky group of researchers across nearly their entire careers!

    UPDATE (2012-08-27): Also see Neuroanthropology on the same topic.

  • Outsourcing research

    Fri, 2012-08-24 11:16 -- John Hawks

    Richard F. Wintle describes his job coordinating grant-seeking and laboratory work in a Canadian research institute: "The unsung heroes behind those big genomics breakthroughs". The subheadline is "Sometimes the best way to do an experiment is to have someone else do it for you".

    Perhaps I'm fortunate in that I'm not an independent, "Principal Investigator" researcher, meaning that I largely don't have to teach, and I usually don't write my own grants. A big piece of what I spend my days doing is helping other scientists get their applications in shape, and even more importantly, helping to run a core facility to help them get their experiments done. It's a slightly unusual niche for a career scientist – not an independent researcher, not a lecturer, but more like running a small-to-medium sized biotechnology company that happens to be not-for-profit.

    Science is done by those who don't teach much, and that has consequences for the kind of science we do, the kinds of questions we ask.

    I was a participant in a panel here yesterday helping early-career faculty become better teachers. It is really sobering to realize just how little teaching most faculty members in the sciences do. From my context in anthropology, it is hard to imagine a new Ph.D. going straight into a tenure-track faculty position with no prior teaching experience whatsoever. Fields in the biological sciences are really varied in what teaching obligations they expect from faculty, and from my students' standpoint, it shows.

    I think there's no question that teaching makes people better researchers, but there's also little question that teaching obligations make faculty publish less. There's a trade-off. I think we should prefer better research as opposed to more publications. But the linked article gives a different perspective -- the ultimate step being the "outsourcing" of research from universities altogether.

  • Academic stultification

    Tue, 2012-08-21 13:56 -- John Hawks

    My University of Wisconsin colleague, the historian Bill Cronon has a recent essay that asks why, if history is so interesting to the public, "professional" historians are so boring: "Professional Boredom"

    And yet: in this act of gathering to talk with those who share our passions, professional historians—again, like all professionals—run the risk of failing to notice the absence of those who don't feel welcome in the conversation. Although one of the great virtues of history among academic disciplines has been its relative openness to scholars trained in other fields, it still unavoidably has some of the attributes of a guild. Professional historians keep track of each other's work, compete with each other in complex status hierarchies, belong to social networks that require great effort to join, and engage in critical dialogues that often grow ever more technical and self-referential the more vigorous (and sometimes pedantic) they become. Before long, even colleagues with PhDs in other disciplines have no idea what we're talking about or why it matters. Worse still, because history involves so many subfields dealing with so many times and places, even most of our colleagues in history share this confusion more than we're typically willing to admit.

    His essay concludes with the message that "professionals" should welcome bloggers, documentary writers, trade book writers and others who make history more interesting to people.

    Anthropology could benefit from the same conversation.

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Neandertals

For years, I've worked on their bones. Now I'm working on their genes. Read more about the science studying these ancient people.

Denisova

From a finger bone of an ancient human came the record of a completely unexpected population. My lab is working on the science of the Denisova genome.

Acceleration

The advent of agriculture caused natural selection to speed up greatly in humans. We're uncovering some of the ways that populations have rapidly changed during the last 10,000 years.

Malapa

Just outside Johannesburg, the Malapa site is producing some of the most exciting finds in human evolution. This site is the headquarters of the Malapa Soft Tissue Project.