Beyond the Gee Whiz Graph – the OMG Graph

August 1, 2012
Posted by Jay Livingston

How to make a 13% increase (4.6 percentage points) look like a quintupling.

I’ve blogged before about “gee-whiz graphs” (here and here ). And I’ve blogged about the inventive graphing techniques of the folks at Fox (here).  But this example may be in a class by itself.
 

In case the numbers are not clear:  Now = 35%, Jan. 1. 2013 = 39.6%.  The heights of the bars make a 13% increase appear as a 400% increase.

HT: I’m not sure who posted this first.  I got it thanks to Sangeeta Parashar.

School Culture and Charter Schools

August 1, 2012
Posted by Jay Livingston

An episode in the first season of the “The Wire” opens with Wallace, a  teenage boy who works for drug dealers, getting grade school kids ready for school. Parentless, they all live in a boarded-up building, electricity tapped from elsewhere by a long extension cord. Wallace gets the kids up, drops a juice box into each kid’s bag, and pushes them out the door. Then he too goes outside and sees the brutally murdered body of another young man involved in the drug trade.

I thought about that moment when I read Joel Klein’s op-ed (here) in the Wall Street journal crowing about recent test scores in New York City’s charter schools. Klein is the former head of New York’s public schools and a big supporter of charters.

Although the traditional public schools in the city have about the same ratio of poor children—and a significantly smaller ratio of black and Latino children—the charter schools outperformed the traditional schools by 12 points in math and five points in reading. Those are substantial differences.

Klein is overstating the case. Not all poor, minority children are alike, and there’s good reason to believe that the charter school population and the regular public school population differ in some important ways. For one thing, the charter kids all have parents who are involved in these new schools. Some charters make a considerable effort to reach these parents. The Success Network charters – the ones that Klein mentions specifically – spent $880,000 recruiting students to its four schools and another $1.3 million on “network events and community outreach." [source]

Those kids on “The Wire” will not be applying to the Success Network.

Charter test averages also benefit from the lower proportion of special-ed pupils and pupils who are not fluent in English. Perhaps most important, charter schools can and do get rid of “difficult” children – those who are discipline problems and those who do not perform well academically.  And when such a child leaves the school, the charter can just leave the seat empty rather than putting in another student. The regular public schools do not have the luxury of these options.

But let’s suppose that even controlling for these factors NYC’s charter school kids did outperform the traditional schools. The obvious question is why. Klein’s answer is all about the “culture” among the teachers. Charter teachers “thrive in a culture of excellence, rather than wallow in a culture of excuse.” 

Maybe so, but kids themselves, who far outnumber the staff, play a large part in a school’s culture.  Every school, including universities, has a “student culture” that differs from the culture the staff would prefer. The question is in what ways does it differ, and why.

The day after the Journal ran Klein’s op-ed, the Times columnist Joe Nocera  also wrote (here) about schools in neighborhoods with high levels of poverty.  He quotes Dr. Pamela Cantor, a psychiatrist, who found that many of these kids showed symptoms we usually associate with trauma and high stress. 

If children are under stress, the ways they respond are remarkably similar.  They get sad, distracted, aggressive, and tune out.

Nocera summarizes what she found in high-poverty schools.

Chaos reigned. The most disruptive children dominated the schools. Teachers didn’t have control of their classrooms — in part because nothing in their training had taught them how to deal with traumatized children. Too many students had no model of what school was supposed to mean. “These were schools that were not ready to be schools.”

In a school where chaos reigns, even the good kids – the ones who entered the charter lottery but lost – will not learn as much.  

Klein attributes the success of charters – their “culture of excellence” – to the absence of “oppressive union contracts.”  But that success may have more to do with the absence of those most disruptive students – the kids whose parents are unable or unwilling to be involved in their child’s education, the kids who, if they do get into charters, are forced out. The real importance of charter selectivity is not that getting rid of some low scorers raises the average. It’s that even a small number of difficult, thuggish children can change the learning environment for all. If all those children are removed from charters and put in traditional schools, the effects can be profound.

What if this were like a football match where the teams switch sides at the half?  What if the regular public schools could recruit and select students and get rid of their most disruptive admissions mistakes, and the Success Network charters had kids like the drug-dealing Wallace and the abandoned kids living with him in the abandoned building?

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* * When I said that Klein was a “big supporter” of charters, I did not mean only that he liked the idea of charters. His support was much more material. He helped Eve Moskowitz, head of Success Network, get financial help for her schools. And he pushed traditional public schools out of buildings in order to give the space to Success charters. As the Daily News story headline put it, “Eva Moskowitz has special access to Schools Chancellor Klein - and support others can only dream of.”

The Humidity, Not the Heat

July 28, 2012
Posted by Jay Livingston

Ideology influences how we perceive reality.  That’s most obvious in the way sports fans perceive close calls.  “They Saw a Game” (1954) was really “They Watched a Game, But They Saw Two Different Games.” 

I posted recently (here) on how people’s politics influences whether they think the economy is good or bad (or terrible).  And back in March, at the end of the warm winter, I posted this graph showing that political views influenced people’s perceptions of the weather.  Less surprisingly, ideology played an important role in the reasons people chose in explaining the warm winter.

But apparently when it comes to ideology’s influence, it’s the heat, not the humidity.   A new study in Weather, Climate, and Society (here, gated) looked at surveys from 2008-2011.  The abstract says in part

We test rival hypotheses about the origins of Americans’ perceptions of weather change, and find that actual weather changes are less predictive of perceived changes in local temperatures, but better predictors of perceived flooding and droughts. Cultural biases and political ideology also shape perceptions of changes in local weather. Overall, our analysis indicates that beliefs about changes in local temperatures have been more heavily politicized than is true for beliefs about local precipitation patterns. Therefore risk communications linking changes in local patterns of precipitation to broader changes in the climate are more likely penetrate identity-protective cognitions about climate.

Here’s my shorter version:

People’s perceptions of rainfall are more accurate than are their perception of temperatures.  If you try talk about temperature, you run up against misperception based on ideology.  If you want to convince conservatives that climate change and global warming are real, talk about the drought (or floods), not the heat.

The study is gated, and I was too cheap to pony up the $25, so I have no details.

It’s also possible that this moderately hopeful finding does not carry over to 2012.  Maybe conservatives have convinced themselves that this little dry spell isn’t all that much, certainly not part of a pattern, and that all this talk about drought, like the talk about heat, is the product of a conspiracy among 98% of the world’s climate scientists (and nearly 100% of those not on the payroll of energy behemoths).

Thank You For Guzzling

July 26, 2012
Posted by Jay Livingston

Sociologist Peter Berger is hauling out the strategy he used when he hired himself out to Big Tobacco.  His role then in Tobacco’s fight against regulation and other anti-smoking measures wasn’t to defend smoking as virtuous or healthful.  Instead, he was paid to discredit anti-smoking sentiment and organizations.  Berger’s tactic for this purpose was basically name calling combined with accusations that even if true were irrelevant.

This time, in a longish (2400 word) article at The American Interest, he’s speaking up for the people who bring us sugar water.  Or to be scrupulously accurate, he’s trying to discredit the anti-obesity, anti-diabetes forces trying reduce the amount of the stuff that people drink.

As I said, it’s a page form the same playbook he used when he was working for the folks who bring us cigarettes. He refers to the “vehement passion” of the anti-smoking and anti-obesity campaigns, and he exaggerates their goals (while showing off his erudition):

I suggested that it was in an age-old tradition of the quest of immortality, first described in the ancient Mesopotamian Gilgamesh Epic.

He also accuses them or their supporters of venal motives.

Successful morally inspired movements typically ally themselves with powerful groups motivated by very hard material interests.

This from someone who was being paid by a multi-billion dollar industry to further their material interests. This irony is apparently lost on Berger, who, interestingly, does not even hint that he got penny from Tobacco. Maybe he forgot.

In going after the movement to improve public health, his number one target is Mayor Bloomberg and the proposed ban on the sale of huge-sized sugar-water drinks in theaters, restaurants, and other public places. 

Again, Berger is not arguing that obesity is good for you.  Instead, he dusts off the old “immortality” barb – equating a desire to reduce diabetes and other illnesses with the vain and impossible goal of immortality. Berger does not tell us how he managed to discover this immortality fantasy in the minds of others, a deep motivation the anti-obesity people are themselves are unaware of. He just makes it the title of his article  (“Mayor Bloomberg and the Quest of Immortality”) and asserts it a few times.  We have to take it on faith.

Berger makes the same arguments he used against anti-smoking campaigns:

• The anti-obesity forces will be moralistic (Berger refers to them with religion-based words like crusaders, litany, preaching).  
• They are elitist. Not only do they see their own lifestyle choices as virtuous, but they try to impose these on the working class. 
• They ally themselves with people whose material interests are served by anti-obesity or with (shudder) bureaucrats. 
• They are European, un-American.

I cannot say whether Bloomberg’s quasi-European lifestyle has anything to do with his idea of New York City as a quasi-European welfare state.*

Then there is the “slippery slope” argument – the scare tactic of exaggeration and false equivalency.

There is also an equivalent of the Saudi Arabian police force dedicated to “the promotion of virtue and the suppression of vice”—an army of therapists, coaches, educators, advice columnists, dieticians, and other moral entrepreneurs. To date (still) they mainly rely on persuasion rather than coercion. Wait a little. [Emphasis by Berger.]

Yes, you read that correctly.  If you can’t buy a 30-oz. cup of sugar-water and instead have to buy two 15-ounce cups, the Saudi police are just around the corner. 

I wonder what Berger and libertarians in general were saying back when the good-health forces were trying to get lead removed from gasoline and paint.  Could you pretty much do a find-and-replace for the current article, just as that article is a find-and-replace version of his tobacco work?**

UPDATE:  Baptiste Coulmont tweets a link to a 2006 article (here) by a French sociologist, Robert Castel, which uncannily echoes Berger’s arguments.  Castel uses the same vocabulary of religion in mocking the anti-smokers, and he attributes to them the same desire for  immortality.

Le fumeur d'hier comme le fumeur d'aujourd'hui transgresse le seul sacré que nous soyons désormais capables de reconnaître, le culte du corps, de sa santé, de sa longévité, sur lequel s'est finalement rabattu le désir d'éternité.  [emphasis added]

He likens anti-smoking policies to Islamic authoritarianism:

ce mélange d'autoritarisme bien-pensant, de suffisance pseudo-savante et de bonne conscience sécuritaire qui caractérise souvent les ayatollahs de la santé. [emphasis added]

And he sees the same slippery slope.

L'interdit du tabac n'est pas la dernière des prohibitions que l'on nous prépare.

The major difference from Berger is that, as far as I know, Castel was not being paid by Gauloises.

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*By the way, if you’re looking for an example of paralipsis or apophasis, look no further than that sentence.

** For more on Berger and Tobacco, see Aaron Swartz’s article (here).  (HT: Andrew Gelman).  And yes, this is the same Peter Berger that sociologists of a certain age may remember as the author of that staple of Soc 101, Invitation to Sociology, and also as co-author of The Social Construction of Reality.