The Skeptical Teacher

Musings of a science teacher & skeptic in an age of woo.

Posts Tagged ‘Teller’

Election 2012 and a Reminder that Pollsters are B.S.

Posted by mattusmaximus on May 22, 2012

As we ramp up for yet another frenzied political season where, no doubt, there will be much drama and mudslinging, I’d like to leave you all with this one thought: for the most part, political polls and pollsters are bullshit.

This article does a good job explaining why…

Pay no attention to the pollster behind the curtain

There are many ways to keep score on whether Barack Obama or Mitt Romney has better odds of winning the general election, which is almost exactly six months away. Here at The Signal, we are fervent evangelists of the political prediction markets, where people place real money on the line to bet on the winner. These markets proved to be more prescient than polls in the Republican primary.

Many journalists prefer to stick to reporting on raw daily polls. While these surveys offer valuable information, it is dangerous to read too much into the daily fluctuations, especially this far in advance. Currently, Rasmussen has Romney leading Obama 49 to 44, while Rueters/Ipsos has Obama leading Romney 49 to 42. This disagreement is due to several common sources of error that occur on any poll. Averaging several polls to get an aggregate figure, as RealClearPolitics does, helps ameliorate these errors.

Upcoming work by Bob Erikson of Columbia and Chris Wlezien of Temple, recently presented at the Midwest Political Science Association conference, demonstrates a second problem with following the daily polls too closely. The researchers looked through past presidential elections, aggregated the national polls, and created the most effective forecast based on that data. They found that, even when properly aggregated and averaged, national polls do not have predictive power at this point in the cycle. … [emphasis added]

You can read the entire article to get the gist of how untrustworthy most politically-oriented polls can be, but I think it is said even better by skeptical magicians Penn & Teller 🙂

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Penn & Teller Call “Bullsh*t!” on Anti-Vaccination

Posted by mattusmaximus on August 24, 2010

Today, I got my annual influenza shot, and as I was doing so my thoughts naturally turned to the general question of vaccines & the pseudoscience spread by those who think vaccines are somehow, in some weird alternate reality, a bad thing.  Bottom line: the anti-vaccination movement is dangerous because it endangers the lives of innocent people; the results of widespread non-vaccination can be deadly.  I think skeptical magicians Penn & Teller articulate very well in this video exactly why this is the case.  Please, get vaccinated, and share this important & life-saving message…

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Why So Much of Polling is B.S. — F**k You, Frank!

Posted by mattusmaximus on October 3, 2009

“The numbers don’t lie” goes an oft-quoted saying… and that’s true, for the most part.  Numbers don’t lie, but what does lie is the people who are reporting the numbers.  The recent brouhaha over health care reform in the United States has brought this fact about numbers & statistics into stark relief of late.  Most people, when they read a poll, don’t really think about the numbers all that much, or they are too innumerate to really understand what they’re reading – which is how so many are easily manipulated.  And oftentimes the polls are self-contradictory.

For example, look at this recent article – which is, refreshingly, a good example of critical thinking in the modern media – concerning the question of polling public opinion on health care reform…

Health care polls leave pols dizzy

Legislators hoping to learn what their constituents think about the issue — and how to vote to keep them happy — face a dizzying deluge of hard-to-reconcile data, some of which suggests that voters are more than a little confused, as well.

What to make of it, for example, when one poll finds that 63 percent think “death panels” are a “distortion” or “scare tactic,” and only 30 percent think the issue is “legitimate,” while another finds that 41 percent believe that people would die because “government panels” would prevent them from getting the treatment they needed?

Or when one survey finds that 55 percent of Americans support the public option, while another says 79 percent favor one — but also notes that only 37 percent people surveyed actually knew what “public option” meant?

And because there is such ambiguity in these polls, those with an agenda can usually cherry-pick whatever data they want to make a case for their particular argument.  Even changing the wording of a particular question just slightly can have a huge impact…

Read the rest of this entry »

Posted in mathematics, media woo, politics | Tagged: , , , , , , , , , , , , , , , , , , , , | 5 Comments »

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