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The mythical 'science' of predicting elections

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  • The other day while switching TV channels, I heard a commentator explaining that a particular party in a particular state was on the edge of big gains. Then he qualified this by explaining that factionalism could hold back the projected rise in the party’s vote share. He then added the rider that one must not forget that minor issues can in the circumstances lead to major vote swings. I am a little dense and was at a loss to comprehend what he wanted to say, even though he had all sorts of graphs and charts to point to.

    I may be over-cynical, but I get the impression in fact that organisations and political parties select pollsters whose own political predilections are in sync with theirs. Or else pollsters smartly fine-tune their surveys to suit whoever is footing the bill. The boss after all likes to hear good news, not Cassandra-like prophecies.

    When irate politicians question the data of poll predictions, which vary drastically from their feedback at the grassroots, television anchors and interviewers explain patronizingly that poll prediction is a science, based on statistical data and there is no chance to fudge. But a well known pollster once admitted in an interview that he alters his final reading from the "raw data" he receives because he has to add his own input in the light of certain perspectives.

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    For instance, a pollster has to take into account "the fear factor". This means that dalits may be too afraid to disclose their vote preference openly to caste Hindus. Or in a state like Gujarat, voters might feel insecure over openly voicing their resentment against the government. Some would dub this "perspective" "doctoring" -- but heck, who can argue with "scientists" who have the disarming ability to throw statistics of all sorts in your face?

    ... contd.

    PreviousNext1234
    TRP, TRP, TRP!!!By: S. Jain | 05-May-2009 Reply | Forward It is obvious that the author has had no formal training in advanced statistical methods. There are two clues for this conclusion: (i) The concept of “margin of error” is an in-built prediction error for any statistical exercise of this nature (remember that the poll prediction exercise is based on the responses of a sample consisting of, maybe, 15,000 prospective voters from a total voter population of about 750,000,000 i.e. nearly 1:50,000!); (ii) the author has obfuscated her argument on the science behind this statistics by subtly (brazenly?) suggesting that “doctoring” is an accepted ploy within the profession: no, it is not, and such doctored statistical exercises are, ab initio, void, whatever any dubious proponent of such fudging might say. Besides misunderstanding the inherent limitations of poll predictions, the author also needs to understand why the psephologists’ tribe still thrives on mainstream TV – it’s the bottom-line, dear, eyeballs, TRP, baki sab bakwas, literally.
    Which side are you on? By: Ramesh Sahni | 05-May-2009 Reply | Forward Looks like you are one those pseudo-seculars who dot the media and bash the BJP and its constitutents as to the damage they could do if they came to power. Getting back to the point, we cant have a Third Front or Congress come into power this time.......!
    Prediction for UPBy: satya | 05-May-2009 Reply | Forward I remember during UP elections, many pollsters went totally wrong in their prediction. No one really predicted Mayawati would get a majority. However, later ndtv did a detailed analysis on why it went wrong and the analysis was very interesting.
    The mythical 'science' of predicting electionsBy: Raghbendra Jha | 04-May-2009 Reply | Forward Pollsters routinely get their predictions wrong. They should be held accountable for these errors since they set up certain expectations upon which people act and then these expectations are belied. There are real economic costs to such mistakes. Media outlets also have a responsibility to stop airing such unmitigated nonsense. But, of course, accountability in public life is moribund in India and, tragically, in the media as well. Physician, heal thyself!
    holier than thou!!By: Pratik Bhandari | 03-May-2009 Reply | Forward I agree with this article. But I am inclined to believe that the NDTV prediction is better than the others. Again, cant say I have any scientific measure of authenticity of prediction either.
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