Ben X, and other films about autism

by Ingrid Robeyns on April 6, 2012

Following up on the last post on Autism, one important way to get some glimpses, or some partial sense, of what it can be to living with autism, are movies. If you ask the vast majority of people whether they have every seen a movie on autism, I suspect they will say they’ve seen Rain Man. I haven’t seen this movie for many years, so shouldn’t talk about it in detail, but what I can say is that it so much skewed my understanding of autism that I wonder whether it may have been better if I had not seen this movie at all. I have, by now, met many people with autism, but not a single one that resembles Rain Man. Yet it does point to a much more general issue, which is that given how radically different people with autism can be, one single portrait of a person with autism will inevitably lead to a very limited understanding of what autism is. But except if one were to make a movie on an organization (a school, or a company) that has many members who have autism, I don’t see a way around this problem.

So, here are two other movies I’ve seen recently, that I’d like to mention for different reasons.
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Philosophy Podcasts

by Brian on April 5, 2012

Recently Kevin Drum asked his readers for podcast recommendations. I learned two big things from his “nice summary of the replies”:http://motherjones.com/kevin-drum/2012/03/your-favorite-podcasts-revealed.

One is that the “In Our Time”:http://www.bbc.co.uk/podcasts/series/iot archives have now been made available. This is a very nice thing for the BBC to do, and I suspect I’ll be spending a lot of time listening to them over the forthcoming months.

The other is that there is a lot of demand out there for philosophy podcasting. As well as In Our Time (which has over 60 philosophy programs in its archive), there were a lot of recommendations for David Edmonds and Nigel Warburton’s “Philosophy Bites”:http://www.philosophybites.com/.

So in the interest of satisfying that demand, I thought I’d post a link to a couple more philosophy podcasts, and see if CT readers had suggestions for more.

“Philosopher’s Zone”:http://www.abc.net.au/radionational/programs/philosopherszone/ is a weekly philosophy show on Australia’s Radio National. It features a mixture of public lectures, interviews with philosophers, and programs on specific topics.

“The 10-Minute Puzzle”:http://www.abdn.ac.uk/philosophy/nip/tenminutepuzzle/ is a new podcast series out of the Northern Institute of Philosophy centre in Aberdeen. It basically does what it says on the tin: introduce a philosophy puzzle and some of the natural solutions to it in 10 minutes.

The links I’ve posted so far have a pretty high concentration of male presenters. But I’m sure that if I knew more about what was available, that imbalance would be somewhat corrected. So, any further suggestions?

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Because: Imperialism!

by Henry Farrell on April 4, 2012

Preliminary throat-clearing: as promised, a reply to David Graeber’s reply below, or rather, to the particular bits of it that concerned me. Before getting into the substance, let me briefly clear up that I won’t be talking at any length about what I think of his general conduct, style of argument in which he claims that serious critics are liars out to delegitimize him and so on. As you may imagine, I am very unhappy with his behavior – but I also believe that for purposes of analysis one ought to separate the person from the work. Worse people have written better books. I will, however, note (since Gabriel Rossman is too nice to do this himself) that Graeber’s account of their Twitter interactions is extremely tendentious, to the point of being more or less unrecognizable to me.

Warning: what comes below is rather long. The first section will look at the specific complaints in Graeber’s reply, each in its turn. The second will return to the book chapter in question. The third will look at broader issues of how to study imperialism.

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Can a neurotypical understand what autism is?

by Ingrid Robeyns on April 3, 2012

I have recently become more and more interested in the relevance of an epistemological question for its consequences for social and political philosophy, namely: To what extent are certain types of knowledge only accessible to those who have had certain experiences? And how do one’s values, judgements, etc. change (or not) after having lived through certain experiences? Intuitively, it seems so obvious to me that some sorts of knowledge (or perhaps ‘understanding’ is a better word?) cannot, or can only in an extremely difficult way, be reached without having had certain relevant experiences. We can all think of concrete examples in our own lives (e.g. how one’s views on death and sorrow change if for the first time one loses a very dear loved one; how views on human vulnerability change if one becomes a parent etc). But this also holds for knowledge/understanding of less personal and more social/political issues. For example, my colleague Constanze Binder once lived with Indigenous women in Oaxaca in Mexico, and recently wrote a short piece about how their practice to switch roles between men and women one day a year (on international women’s day) has lead to most progress in the fulfillment of their demands. Understanding can be an important factor in creating willingness to chance.

How does this question of knowing and understanding applies to autism?
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Bottle the Inflation Monster!

by niamh on April 3, 2012

Do you know what the ECB does? It fights the Inflation Monster! Which used to rampage around in some indeterminate quasi-Dickensian era (evidently standing in for ‘the past’). Hilarious video is here.

Because ‘Lower interest rates generally spur economic activity, while higher interest rates slow inflation down’.

Now I know that these materials are produced for educational purposes and they aren’t going to get too complicated, and the mandate of the ECB is inflation-targeting. But reading them, you might be left wondering where this economic activity was to come from, what generated demand, how growth comes about. You wouldn’t easily pick up that interest rates are currently at extraordinarily low levels in the midst of a savage economic downturn (recession in Ireland, Greece, Spain, and Portugal), or that there are big debates about how monetary and fiscal policy link together. Nor would you get much insight into the problems entailed by having a currency union with a central bank that can’t pool lending risks or act as lender of last resort to governments, but which has taken on this role for the private sector through an extraordinary surge in liquidity provision, since keeping banks solvent is less politically controversial.

Furthermore this seems to me to play once again into the view that ‘economics’ is technical and has right answers, while ‘politics’ is emotive and contested, so students of the EU don’t have to talk about it.

Q: ‘What is the meaning of life, the universe and everything?’
A:  ‘<2%’.

It seems – it is – a very long time since Helmut Schmidt famously stated that ‘five percent inflation is easier to bear than five percent unemployment.’

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Bilingualism

by Brian on April 2, 2012

Last week the linguistics department here at Michigan hosted the 2012 “Marshall M. Weinberg Symposium”:http://www.lsa.umich.edu/linguistics/events/marshallmweinbergsymposium. The theme for this year’s symposium was _bilingualism_. I learned a ton from the various speakers, much of it about how hard it was to learn a second language after very early childhood.

Even people who appear, to naive judges, to be fluent in a second language they learned after childhood, perform “well below native speakers at cognitively demanding linguistic tasks”:http://onlinelibrary.wiley.com/doi/10.1111/j.1467-9922.2009.00507.x/abstract, such as understanding speech in noisy environments, or explaining proverbs. I don’t have the citation link for this, but “Jürgen Meisel”:http://www1.uni-hamburg.de/romanistik/personal/w_meis.html reported that German students learning French by immersion did much better if the immersion started between 32 and 42 months than they did if they started after 42 months. The errors that he reported were common among the older learners after several months of immersion, like not getting the genders of articles right even for words like maman where you would think it was obvious, were really striking. “Karen Emmorey”:http://emmoreylab.sdsu.edu/director.php reported that the same thing was true for learners of ASL; late learners can become fluent enough for practical purposes, but are never as good as people who learn ASL in early childhood.

The striking contrast to all this is how successful first language acquisition is. To a first approximation, 100% of people successfully learn the syntax of their first language, and do so at a staggeringly young age.

I realised a few days after the symposium that there was a huge question I wish I’d asked. _Why_ are we so good at learning a first language, and so poor at learning a second language. What cognitive system would have such a feature(/bug), and what evolutionary advantage could there be to having such a system?

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Seminar on Debt: The First 5000 Years – Reply

by David Graeber on April 2, 2012

Let me begin with an apology—for two things, actually. First, for the fact this response to the seminar on my debt book was so long in coming. It happening that at the time the seminar was going on I was desperately trying to finish a book with a very firm deadline (not to mention I was also struggling with a flu, which added all sorts of interesting complications. I did finish it though. Only just.) Second, for the fact that, to make up for the delay, I seem to have overcompensated and the response became… well, as you can see, a little long.

Sorry.

Allow me also to remark as well how flattered I am by so much of this discussion. When I wrote the book it never occurred to me I would end up being compared with the likes of Polanyi, Nietzsche, or even Ernest Mandel. I shall try very hard not to let this go to my head. Now how shall I start? It would be ungracious not to respond to each in some way. But I think it might be best to start by clarifying a few issues that seem to crop up pretty frequently, both in this seminar and in other reviews and comments I’ve seen on the internet. Then I will take on the specific responses.
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Autism: what needs to change?

by Ingrid Robeyns on April 2, 2012

Today is World Autism Awareness Day. Autism manifests itself in many different ways, and it is a saying that each person with autism is not only different (we are all different!) but rather experience autism differently, and has different aspects of autism which affect him or her. In this series of post around Autism, I do not just want to discuss issues around autism from a third-person perspective (like the over-diagnosis question, or new scientific advances, or new books we’ve discovered), but also give the floor to those who live with autism, or those caring for & working with people with autism. I’d like to ask one question: What are the most important changes which you’d want to see related to autism, given your life and the context in which you operate? My (very particular and context-depedent) answer to this question is below the fold.

update: There is an excellent post over at Neurotribes written (and in part edited/collected) by Steve Silberman, which addresses exactly the question what needs to change. DO go read it.
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Autism: a public discourse blaming teachers and parents

by Ingrid Robeyns on April 1, 2012

In this first of a series of post on autism, I want to talk about the blaming of parents and teachers which has been going on in the Netherlands for a while. It’s not the most uplifting post of what I am planning to write over the next week, but I think it nicely illustrates why we need this Autism Awareness week in the first place. One of the things that I’m curious to find out is whether this is a particular Dutch phenomenon – I fear not, but don’t know. [click to continue…]

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Autism awareness day/week

by Ingrid Robeyns on March 31, 2012


Monday April 2nd is World Autism Awareness Day. Yet in the Netherlands (and I suspect other countries as well), today starts the ‘Autismeweek’ (no translation needed!) – a full week in which people who care about people with autism (which includes people with autism as well!) try to put autism in the spotlights, raise awareness, inform the wider public, and speak up or speak out.

So I am hoping to post one autism-related post every day, covering various aspects – scientific discussions, books and films on autism, a thread on the bright/funny sides of autism, and a few more. If anyone has additional suggestions or special requests, feel free to make suggestions.

This opening post also serves as a place where all of you can post links to your own contributions to autism awareness day/week, and to activities (whether in cyberspace or beyond) that are organized within the frame of World Autism Awareness Day.

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Seeds of its own destruction

by niamh on March 31, 2012

John Lanchester has an interesting and thoughtful essay on the continuing relevance of many of Marx’s ideas in the current issue of the London Review of Books. He calls himself an ’empiricist’, meaning someone who takes seriously evidence about how the world as we know it works. He notes that Marx would consider his perspective ‘philosophically and politically entirely invalid’. But he argues that ‘Marx was extraordinarily prescient. He really did have the most astonishing insight into the nature and trajectory and direction of capitalism’. I’m with Lanchester on all these points. His novel Capital  (set in London) is one of the most enjoyable of the recent crop of crisis fiction, and his non-fiction Whoops! is genuinely informative. Here are some of his reflections – there is much  more in the essay itself:

Three aspects which particularly stand out here are the tribute he pays to the productive capacity of capitalism, which far exceeds that of any other political-economic system we’ve ever seen; the remaking of social order which accompanies that; and capitalism’s inherent tendency for crisis, for cycles of boom and bust…

We have at the moment this monstrous hybrid, state capitalism – a term which used to be a favourite of the Socialist Workers Party in describing the Soviet Union, and which only a few weeks ago was on the cover of the Economist to describe the current economic condition of most of the world. This is a parody of economic order, in which the general public bears all the risks and the financial sector takes all the rewards – an extraordinarily pure form of what used to be called ‘socialism for the rich’. But ‘socialism for the rich’ was supposed to be a joke. The truth is that it is now genuinely the way the global economy is working…

He foresaw the development of a proletariat who did most of the world’s work and a bourgeoisie who in effect owned the fruits of their labour. The fact of the proletariat being in the developing world, in effect shoved out of sight of the Western bourgeoisie, does nothing to disprove that picture – an ‘external proletariat’, it’s sometimes called…

The most obvious mistake in his version of the world is to do with class. There is something like a classic Marxian proletariat dispersed through the world. But Marx foresaw that this proletariat would be an increasingly centralised and organised force: indeed, this was one of the reasons it would prove so dangerous to capitalism…  But there is no organised global conflict between the classes; there is no organised global proletariat. There’s nothing even close. The proletariat is queuing to get into Foxconn, not to organise strikes there…

There are lots of different capitalisms and it’s not clear that a single analysis which embraces all of them as if they were a single phenomenon can be valid…Pretty much everyone lives longer and enjoys better health. If that is true, can it be true that capitalism consistently and reliably immiserates? Can it be true that the system is destructive, if people who live under it quite simply live longer?

He saw how capitalism would transform the surface of the planet and impact on the life of every single person alive. There is, however, a crack or flaw close to the heart of his analysis. Marx saw the two fundamental poles of economic, and social and political, life as labour and nature. He didn’t see these two things as static; he used the metaphor of a metabolism to describe the way our labour shapes the world and we in turn are shaped by the world we have made. So the two poles of labour and nature don’t stay fixed. But what Marx doesn’t allow for is the fact that nature’s resources are finite…

As Marx wrote, towards the end of the first volume of Capital, ‘man is distinguished from all other animals by the limitless and flexible nature of his needs.’ Limitless needs we see all around us and they’ve brought us to where we are, but we’re going to have to work on the flexible part.

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Republican conservatism (complete rewrite)

by John Q on March 30, 2012

The first version of this was a trainwreck, as can be seen from the comments, so I’ve decided to rewrite it completely, trying to be as clear as possible about how I read Mooney and what I think myself.

Chris Mooney has a great talent for knowing just when to push the envelope. Back in 2005, when CT held a book event on The Republican War on Science, the idea that Republicans as a group were hostile to science and scientists was somewhere between controversial and unthinkable, as far as mainstream Sensible opinion was concerned. Now, it’s a truth universally recognised – even the professional Repub defense team doesn’t deny it, preferring the (demonstrably false) line that Dems are just as bad.

Now, with The Republican Brain Chris pushes the argument a step further with the question: why are Republicans  the way they are, and what, if anything, can be done about if? 

Before we start, I’ll observe that the set of “conservative Republicans” has changed over time, as have the specific set of policies associated with these terms and the general temperament that goes with this. On the first point, we’ve seen the disappearance of Eisenhower Republicans, the Southern realignment and the rise of the religious right, all of which have increased the concentration of dogmatic authoritarians in the Repub party. On the second, the emergence of environmentalism as a major political line of division is probably the most important development. The fact that Republicans/conservative are increasingly anti-science reflects both of these trends.

It’s also important to observe that Republican/conservative alignment can’t be explained simply in terms of class, geography and education though all these factors play a role. With a few exceptions (notably including blacks and scientists) a substantial portion of nearly every demographic group votes Republican and self-describes as conservative. So, explanations solely based on (for example) class interests, can’t explain voting behavior without a lot of (self?)deception, and that raises the question of why some people are more easily deceived.

Some people may regard themselves as Republican/conservative simply because they have adopted, without thinking too much about it, the political positions that are regarded as normal by their family, social circle and so on. Lots of people simply aren’t interested enough in either politics or science to devote a lot of thought to these issues. Typically, such people will hold a range of views that aren’t particularly consistent either internally or with any standard ideological line.

An obvious inference is that, if people could be given better information they would change their views. But, as Mooney shows, and has become steadily more evident thanks to the Internet, better educated and informed Republicans are more likely to hold crazy views consistently and less likely to change them in response to new information.

That leads to Mooney’s primary conclusion, that Republicans/conservatives don’t simply have different beliefs from liberals/Democrats (or, for that matter, leftists), or even different values. They have (bear in mind that this a statement about population averages) different psychological characteristics, summarised as high authoritarianism and low openness to ideas different from their own.

I find this pretty convincing. It seems to me that there is an authoritarian type of personality which, in the specific circumstances of the US right now, and for non-poor whites, produces a predisposition to Republican voting and “conservative” political attitudes. In particular this type of personality is (more) strongly associated with confirmation bias. That is, not only do they ignore evidence contrary to their initial position, they tend to reinforce their commitment as a result. The creation of an alternate universe in which this bias can be repeatedly amplified (Fox News, rightwing think tanks and so on) both reinforces this kind of thinking and encourages self-selection.

I don’t think there is the symmetry here that some of the commenters are suggesting. Looking at the standard examples of nuclear power and GM foods, it seems to me that, on the whole people on the left have been more open to evidence than in the corresponding cases on the right. In the case of nuclear power, it seemed for a while (say, from the mid-90s until a few years ago) as if the safety problems might be soluble at a reasonable cost in which case an expansion of nuclear power would be preferable to more coal-fired power stations. While the evidence pointed that way, opposition to nuclear power was muted. As it turned out, the problems couldn’t be solved, at least not at a reasonable cost, and Fukushima was the last straw.

In the case of GM foods, the evidence has mostly supported the position that the use of GM technology per se doesn’t create significant health risks, and AFAICT that has been fairly widely accepted on the left (Greenpeace is a notable exception, but I don’t think their position is representative of the left as a whole). That doesn’t rule out opposition to GM on ethical or aesthetic grounds, or opposition to the whole structure of the food industry – the whole point is that you can have preferences and beliefs without assuming that the facts will always be those most convenient to you.

Similar points may be made about “alternative” medicine, particularly opposition to vaccination. It’s primarily, though not exclusively (consider Michelle Bachmann), associated with liberals and leftists in the same way as creationism is primarily, though not exclusively, associated with evangelical conservatives. But, faced with scientific criticism, there hasn’t been anything like the political pushback and doubling down we’ve seen with creationism. The Huffington Post, which was a big outlet for anti-vaxers has started publishing one of their most vigorous critics, Seth Mnookin.

This brings us finally to the question that set off all the fireworks in the original post. To what extent are authoritarian personalities the product of environment, genes or some combination of the two. Again, it’s worth pointing out that, even if there is a genetic role in personality, there’s no such thing as a genetic predisposition to be a conservative/Republican. The content of these terms isn’t fixed, and the implications are very different depending on social circumstances. To take the most obvious case from comments: Republican policies and rhetoric appeal strongly to (US) white tribal/ethnic loyalty. So, US whites who respond well to in-group appeals are likely to vote Republican and call themselves conservatives. US blacks with similar predispositions obviously won’t vote Republican and are unlikely to call themselves conservatives.

To take another example from Mooney’s book, authoritarian attitudes in the US are typically associated with support for free-market/pro-business economic policies and virulent hostility to “socialism”. By contrast, in the former Soviet Bloc, the same attitudes are associated with support for the old order and positive feelings about “socialism” (I’m using the scare quotes to indicate that, in both cases, the term is something of a blank canvas, onto which all sorts of things can be projected). And indeed, in this context, the term “conservative” is commonly applied to hardline members of the surviving Communist parties.

Following up on a comment, this way of looking at things has a lot of similarities with Corey Robin, and The Reactionary Mind. The difference between Robin’s choice of Mind and Mooney’s choice of Brain is significant. As I argued when I looked at his book, I think Robin doesn’t take enough account of personality/temperament. While most soi-disant “conservatives” are authoritarian reactionaries, there is a genuinely conservative temperament which will tend to align with political conservatism in periods when the general tendency of politics is towards the left.

So, does the genetic part of the story matter. As (I think) Andrew Gelman has observed, in this context and many others, it’s just code for things we can’t change. As long as authoritarian personalities are stable over the adult lifetime of those concerned, it doesn’t matter much whether they are determined by genes, by toilet training (as in the caricature version of Freudian psychology I learned in my youth) or by some much more complex process. That said, I think the evidence that heredity (and therefore genes) plays at least some role in the determination of personality is pretty convincing.

The political implication, which has drawn some flak in the comments, but which I think is correct is that there is no point in political engagement with authoritarian conservatives. In a political environment where they are concentrated in one party,politics is going to be a matter the only strategy open to liberals is to outnumber and outvote them by peeling off as many peripheral groups (for example, those who deviate from the approved cultural identity in some way) as possible. Obviously, that’s an unpalatable conclusion in all sorts of ways, but I think it’s a valid one.

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I De-clare, You Could Knock Me Over With a Feather

by Belle Waring on March 29, 2012

Hey, look who isn’t bleeding from the back of his head! At all. Moms isn’t going to have to get out the Thomas the Tank Engine band-aids. Who doesn’t have a grass stain on his jacket? More importantly, who doesn’t have a broken nose? George M.F. Zimmerman, that’s who.

I consider myself something of an expert on the subject of broken noses. Mine first got straight-up broken in a random mugging by a 5’10’-6 ft tall black guy in a black hoodie and jeans. Actually, for real, not lying here. (Needless to say I didn’t bother to report it to the police. I seriously couldn’t have picked him up out of a line-up, and what, I want them to wander along Amsterdam Ave looking for 6 ft tall black guys in hoodies to hassle? What’s the point there? This was a long time ago, at the peak of NYC crime in the early 90s) Not really a mugging because they didn’t end up taking my stuff, more like a freak-out because I was walking too close to him or something and he was high. Whatever. Since then it has been broken numerous times, but because the initial break weakened it, I think, in a number of the cases. I mean, that one time a guy just hit me in the face by accident, that was a plain old hard hit. (Really an accident, not “I’m being abused” an accident.) The later breakages definitely produced less blood/trauma; maybe Zimmerman is in Fight Club?

Anyway, when someone hits you in the face hard enough to break your nose, you look rather distinctly awful. You are pale*, with bruises starting under your eyes, and the place where the break happened is busted open, and there is blood all over the damn place. Coming from the wound on your face, pouring out of your nose: blood everywhere. Now, maybe there’s some other more manly way to get your nose broken I’m not aware of, and that’s just the ladyway of getting the lady-noses broken. Or I’ve been the victim of some particularly bad nose-breakings? That’s frankly not unlikely. In any case, annoying as the video is (the ABC news EXCLUSIVE banner overlays the interesting part of the image for 90% of the running time), it clearly shows a man who was cuffed (so I was wrong about his not being cuffed!), but did not just get the beatdown from Trayvon Luke Cage Martin. He doesn’t even look shook up enough; dude just shot and killed a kid! If I had done that by accident I would be in agony. So, dear readers, a) don’t believe everything you read, and, b) the Sanford police should really have arrested this asshole at the time and their decision looks worse and worse in retrospect.

N.B. in re: trolling. I myself am mildly pro-troll on principle. I would prefer that there was no one trolling. However, if someone has to troll, they should damn sure be doing it right. Piss everybody off at once. Suddenly advocate nuking Japan for no reason. That’s why, when confronted with the weak-ass “trolling” of…bjk? I can’t even remember; I was inclined to call in the big guns and say if someone’s going to derail my thread it’s going to be a high-quality troll like Bob McManus. I know, you’re all thinking “when the hell are you going to tire of his demands that other people’s blood flow in the streets and so on?” I don’t know. He’s strangely almost exactly like my dad along certain axes, so he’s got a gilt-edge pass from me. We all know he would never abuse that by…what? He just? Oh, well.

*Even very dark-skinned people can look ashen or sallow–fundamentally unwell. In white people this expresses as blanching to paper-white, but there are analogues for the majority of the world that is not white.

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Not-so-hidden persuaders

by niamh on March 28, 2012

I’m currently spending a great semester in the US (at the University of North Carolina at Chapel Hill, a terrific institution with a long and distinguished history – see this! – and excellent academic standing: the very model of the modern public research university; so please don’t cut any more university education spending, NC legislature).

And this has given me an opportunity, among many others that is, to see some US TV close-up…

One thing that is striking, compared with European TV, is what is advertised and how. In particular,  I don’t think you see ads for prescription medicines in Europe, certainly not in Ireland or the UK. They seem to be all over American TV.

I am particularly struck by the way these ads are made. The visuals  typically show someone having a happy and trouble-free life while using these drugs, overlaid with soothing music and a reassuringly bland voice-over. But clearly the US FDA requires advertisers to include all the small print in their ads as well.

Do you read all the known downsides of the medicines you take? Don’t. The list of potential side-effects is usually pretty hair-raising, and hopefully most people won’t encounter them most of the time. So the voice-over has to balance the putative benefits of taking these drugs with all these possible side-effects. But if you actually listened right through to the end, I imagine the last thing you’d want to do is to expose yourself to even a small risk of any of them. Especially when there is another stream of ads by lawyers offering to take up your case and get you compensation for a whole range of damages caused by taking prescription medicines.

So my question is this. Clearly the advertisers think it’s worth running these ads despite the scarifying spoken bits. How does this work? Do they believe that consumers are more impressed by soft-focus pastel visuals and mood-music than by the words? Are consumers more affected by positive visual associations than by the audio information about risk?

We can’t assess the risk rationally ourselves, and I don’t think decision-theory is very helpful here, which is why we rely on regulators and professionals. Yet it seems the advertisers mean us to lobby our doctors to prescribe their brand-name drug. There must be lots of literature on the psychology of advertising that I don’t know about…

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Evaluating students: the halo effect

by Chris Bertram on March 28, 2012

In the thread on community colleges (which morphed into a discussion of more general education and management issues), someone mentioned Kahneman on the “halo effect” in grading (or marking) student work. _Thinking Fast and Slow_ has been on my to-read pile since Christmas, but I got it down from the shelf to read the relevant pages. Kahneman:

bq. Early in my career as a professor, I graded students’ essay exams in the conventional way. I would pick up one test booklet at it time and read all the students’ essays in immediate succession, grading them as I went. I would then compute the total and go on to the next student. I eventually noticed that my evaluations of the essays in each booklet were strikingly homogeneous. I began to suspect that my grading exhibited a halo effect, and that the first question I scored had a disproportionate effect on the overall grade. The mechanism was simple: if I had given a high score to the first essay, I gave the student the benefit of the doubt whenever I encountered a vague or ambiguous statement later on. This seemed reasonable … I had told the students that the two essays had equal weight, but that was not true: the first one had a much greater impact on the final grade than the second. This was unacceptable. (p. 83)

Kahneman then switched to reading all the different students’ answers to each question. This often left him feeling uncomfortable, because he would discover that his confidence in his judgement became undermined when he later discovered that his responses to the same student’s work were all over the place. Neverthless, he is convinced that his new procedure, which, as he puts it “decorrelates error” is superior.

I’m sure he’s right about that and that his revised procedure is better: I intend to adopt it. Some off-the-cuff thoughts though: (1) I imagine some halo effect persists and that one’s judgement of an immediately subsequent answer to the same question in consecutive booklets or script is influenced by the preceding one; (2) reading answers to the same question over and over again can be even more tedious than marking usually is. I thing it would be even better to switch at random through the piles; (3) (and this may get covered in the book) the fact that sequence matters because of halo effects strikes me as a big problem for Bayesians. What your beliefs about something end up being can just be the result of the sequence in which you encounter the evidence. If right (and it’s not my department) then that ought to be a major strike against Bayesianism.

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