Annie Get Your Prior

I was reading Sharon McGrayne’s wonderful popular (no, really!) book on the history of Bayesian statistics. At one point it is mentioned that George Box wrote a song for a departmental Christmas party

There’s no theorem like Bayes’ Theorem
Like no theorem I know…

A bit later we read of Howard Raiffa and Robert Schlaifer singing

Anything frequentists can do, Bayesians do better

(More or less… the exact text is not reproduced.) So it seems the underappreciated role of Irving Berlin in the development of Bayesian thought has yet to be adumbrated. Perhaps researchers will some day uncover such hits manqués as “How High is the Bayes Factor?”, “I’m Dreaming of a Conjugate Prior”, or even “Bayes Bless America”.

More self-deconstructing clichés: Europe edition

I have commented before (here and here) on the weird linguistic phenomenon of clichés being modified to eliminate their actual meaning. Here is an example from yesterday’s BBC report on David Cameron’s attempts to convince other European leaders to support his efforts to rescue his leadership of a fractured Conservative Party reform the European Union:

This was a chance to try to repair burned bridges.

The whole idea of the expression “burn your bridges” is that THERE’S NO MORE BRIDGE! You can’t repair it! Sure, in reality a burned bridge might not have burned completely, so repairs could still be undertaken. But why invoke a metaphorical burned bridge if you actually mean to play down the burn?

What is the writer thinking? “Many people complain that David Cameron has burned his bridges to fellow European leaders. While this is true, those bridges are constructed largely of metaphorical stone, so the damage from burning is not nearly as great as if they had been constructed of metaphorical wood, and repairs are still eminently possible.

“Some in the Conservative Party argue for dynamiting the main pylons of the metaphorical bridges. Metaphorically.”

One might similarly tell of how Alexander the Great, on arriving in Persia, ordered that the ships be burned. But only on the edges, of course, because otherwise they would no longer be seaworthy.

A tricky judgement call for the advertising agency

So you’re the head of the Adobe account, seeking to convince customers that Photoshop is a professional level software tool accessible to the masses. It’s used for important work by experts! It makes news! So now, the question is, do you seek an endorsement based on this news report (from Der Spiegel)?

Russland macht noch immer Kiew für den Abschuss von Flug MH17 verantwortlich. Doch die Fotos, die ukrainische Luftabwehrsysteme in dem Absturzgebiet zeigen sollen, sind offenbar gefälscht. Laut Experten hat der Kreml mit Photoshop manipuliert.

[Russia still claims that Kiev is responsible for shooting down flight MH17. But the photos that supposedly show Ukrainian air defence systems in the area of the crash are blatantly fake. Experts say the Kremlin manipulated them with Photoshop.]

Last refuge

Northern Ireland under pressure after Irish gay marriage referendum win

I’m looking forward to seeing the arguments they will use to resist the pressure. Perhaps Northern Ireland can present itself as a last refuge in Europe for the non-gay-marrying, Christian bakers and florists, antigay clerics. It will help if they can get a high profile asylum case. Maybe the straight son of two North London radical feminists fleeing an arranged marriage to another man.

In all seriousness, I doubt there is anyone who is not astonished at the rapid international progress on same-sex marriage. That includes, most especially, those of us who came of age when acceptance of same-sex relationships was the norm in our student environments and/or recognised the logical force of the argument decades ago. Logical coherence doesn’t usually carry the day in politics nor, I have to admit, should it necessarily. But here we see the power of ideology in political affairs, against those who suppose that politics is merely about balancing competing interests. It’s the ideology of marriage, which had changed enormously in the past two centuries. People like Andrew Sullivan recognised in the 1980s that people’s intuitive understanding of marriage, in Europe and its cultural confrères, had evolved to where it was actually quite hospitable to same-sex marriage. Those of us who felt little emotional attachment to marriage immediately recognised the coherence of this position, but assumed that it would take approximately forever to get over that emotional hurdle, at least everywhere but Holland.

And because I personally attached little weight to marriage, I was definitely among those who thought this an unpromising, because unnecessarily charged, ground to fight on for gay rights. I didn’t see what Sullivan saw, that marriage equality could be the linchpin of a coherent struggle that could overthrow the entire framework of homophobia.

The biggest genetics-investment opportunity ever!

I was just looking at this paper from 2012, that purports to discover the heritability of economic and political preferences by slightly shady statistical analysis of GWAS data. And then it hit me: We could market

An investment plan tailored to YOUR genotype

Okay, we’ll have to work on the catchphrase. Feel free to send your seed money. (The genotype-based diet is running like gangbusters.) Excuse me while I go off for a moment to write the patent application.

Impact!

Which ageing monster?

The New Statesman has a review of a new book, Blair, Inc., about the money grubbing post-Downing-Street career of a certain former Prime Minister. Among Blair’s unsavoury activities, he received £8m a year for providing PR advice and speechwriting services to “an ageing monster whose regime is mired in allegations of torture and murder.” But before you wonder where Gordon Brown came up with that kind of money it’s explained that this is Kazakhstan’s President Nursaltan Nazarbayev, “We learn that a number of people from Blair’s Downing Street team, including Alastair Campbell and Jonathan Powell, also provide services for Kazakhstan.”

Abercrombie cool

I don’t know anything about Abercrombie & Fitch. I know it’s a chain of stores that sell clothes, I’m sure I’ve seen their stores, but I’ve never been inside them. Everything I know about their brand comes from an 80-year-old satire by James Thurber that begins

 I always try to answer Abercrombie & Fitch’s questions (in their advertisements) the way they obviously want them answered, but usually, if I am to be honest with them and with myself, I must answer them in a way that would not please Abercrombie & Fitch. While that company and I have always nodded and smiled pleasantly enough when we met, we have never really been on intimate terms, mainly because we have so little in common. For one thing, I am inclined to be nervous and impatient, whereas Abercrombie & Fitch are at all times composed and tranquil…

Take the one recently printed in an advertisement in this magazine. Under a picture of a man fishing in a stream were these words: “Can’t you picture yourself in the middle of the stream with the certain knowledge that a wise old trout is hiding under a ledge and defying you to tempt him with your skillfully cast fly?” My answer, of course, is “No.” Especially if I am to be equipped the way the gentleman in the illustration is equipped: with rod, reel, line, net, hip boots, felt hat, and pipe. They might just as well add a banjo and a parachute….

I was reminded of this in reading about a case that is currently being considered by the US Supreme Court, in which Equal Employment Opportunity Commission has charged the company with religious discrimination, after it refused to hire a Muslim woman, because her headscarf would conflict with the Abercrombie dress code. (As the law would require reasonable accommodation to be made for religious observance, the legal case turns on the relatively uninteresting question of whether the district manager who made the decision, and who reportedly said  “if we allow this then someone will paint themselves green and call it a religion”, is really the last man left in America so uncontaminated by media representations of Muslims that he is not even aware that Muslim women often wear headscarfs as part of their religious practice.)

According to court documents,

Abercrombie described its brand as “a classic East Coast collegiate style of clothing.” When Elauf applied for a job in 2008, the Look policy included prohibitions on black clothing and “caps”; these and other rules were designed to protect “the health and vitality of its ‘preppy’ and ‘casual’ brand.” As Justice Alito put it during oral arguments, Abercrombie wants job candidates “who [look] just like this mythical preppy or … somebody who came off the beach in California.”

From fly-fishing in an east-coast stream to a beach in California. You’ve come a long way, baby!

We need better scientific fraud

A friend sent me this article about Dutch social psychologist Diederik Stapel, who “perpetrated an audacious academic fraud by making up studies that told the world what it wanted to hear about human nature.” What caught my attention was this comment about how the fraud was noticed:

He began writing the paper, but then he wondered if the data had shown any difference between girls and boys. “What about gender differences?” he asked Stapel, requesting to see the data. Stapel told him the data hadn’t been entered into a computer yet.

Vingerhoets was stumped. Stapel had shown him means and standard deviations and even a statistical index attesting to the reliability of the questionnaire, which would have seemed to require a computer to produce. Vingerhoets wondered if Stapel, as dean, was somehow testing him. Suspecting fraud, he consulted a retired professor to figure out what to do. “Do you really believe that someone with [Stapel’s] status faked data?” the professor asked him.

And later

When Zeelenberg challenged him with specifics — to explain why certain facts and figures he reported in different studies appeared to be identical — Stapel promised to be more careful in the future.

How hard is it to invent data? The same thing occurred to me with regard to Jan Hendrik Schön, a celebrated Dutch (not that I’m suggesting anything specific about the Dutch…) [update: German, as a commenter has pointed out. Sorry. Some of my best friends are Dutch.] materials scientist who was found in 2002 to have faked experimental results.

In April, outside researchers noticed that a figure in the Nature paper on the molecular-layer switch also appeared in a paper Science had just published on a different device. Schön promptly sent in a corrected figure for the Science paper. But the incident disturbed McEuen, who says he was already suspicious of results reported in the two papers. On 9 May, McEuen compared figures in some of Schön’s other papers and quickly found other apparent duplications.

I’m reminded of a classic article from the Journal of Irreproducible Results, “A Drastic Cost Saving Approach to Using Your Neighbor’s Electron Microscope”, advocating that researchers take advantage of the fact that all electron micrographs look the same. It printed four copies of exactly the same picture, with four different captions: One described it as showing fine structure of an axe handle, another said it showed macrophages devouring a bacterium. When it comes to plots of data (rather than photographs, which might be hard to generate de novo) I really can’t see why anyone would need to re-use a plot, or would be unable to supply made-up data for a made-up experiment. Perhaps there is a psychological block against careful thinking, or against willfully generating a dataset, some residual “I’m-not-really-doing-this-I’m-just-shifting-figures-around” resistance to acknowledging the depths to which one has sunk.

Certainly a statistician would know how to generate a perfect fake data set — which means a not-too-perfect fit to relevant statistical and scientific models. Maybe there’s an opportunity there for a new statistical consulting business model. Impact!

Update: Of course, I should have said, there’s an obvious bias here: I only know about the frauds that have been detected. They were unbelievably amateurish — couldn’t even be bothered to invent data — and still took years to be detected. How many undetected frauds are out there? It’s frightening to think about it. Mendel’s wonky data weren’t discovered for half a century. Cyril Burt may have committed the biggest fraud of all time, or maybe he was just sloppy, and we may never know for sure.

I just looked at the Wikipedia article on Burt, and discovered a fascinating quote from one of his defenders, psychologist Arthur Jensen that makes an appropriate capstone for this post:

[n]o one with any statistical sophistication, and Burt had plenty, would report exactly the same correlation, 0.77, three times in succession if he were trying to fake the data.

In other words, his results were so obviously faked that they must be genuine. If he were trying to fake the data he would certainly have made them look more convincingly real.

Birmingham

A “terrorism expert” on Fox News in the US has raised eyebrows on both sides of the Atlantic by informing his viewers that

in Britain, it’s not just no-go zones, there are actual cities like Birmingham that are totally Muslim where non-Muslims just simply don’t go in. And parts of London, there are actually Muslim religious police that actually beat and actually wound seriously anyone who doesn’t dress according to Muslim, religious Muslim attire.

This is, of course, well known, and was first brought fleetingly to public attention by the Rev. Dr Martin Luther King, Jr in his famous Letter from a Birmingham Jail. As some people have forgotten, in his role as president of the Southern Christian Leadership Conference (based in Brighton, I believe) Dr King attempted to open the totally Muslim city of Birmingham to Christians, by staging a nonviolent march. After his arrest by the Muslim religious police (who actually beat and actually wounded him seriously) he penned these stirring words:

I think I should indicate why I am here in Birmingham, since you have been influenced by the view which argues against “outsiders coming in.”[…] I am in Birmingham because injustice is here. […] I cannot sit idly by […] and not be concerned about what happens in Birmingham. Injustice anywhere is a threat to justice everywhere.

I am offering my services to Fox News, to appear as a history expert and discuss this neglected background to the current crisis in Birmingham.

It is perhaps to the credit of “expert” Steve Emerson that his organisation has posted the transcript of this interview, together with a sort-of-apology:

I have clearly made a terrible error for which I am deeply sorry. My comments about Birmingham were totally in error[. …] I do not intend to justify or mitigate my mistake by stating that I had relied on other sources because I should have been much more careful.

There are several more sentences in the same vein, followed by a non sequitur offer of a donation to Birmingham Children’s Hospital. While I appreciate his refusal to “justify or mitigate”, I think in this case an exposition of his sources would be informative, or at least entertaining. But these think tanks are not so much scholarly organisations as conspiratorial cells, and unless we take him to Guantanamo we’ll never get the names of his contacts.

I guess he’s standing by the London comments. I think this is a real opening for Labour, if the government is cutting housing assistance but still funding the Muslim religious police. And he hasn’t yet apologised for neglecting Dr King’s contributions to intercommunal understanding in Birmingham.