How they Calculate an IQ

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How is an IQ calculated?

1. Ask many people the same questions.
2. Count the correct answers received, and
3. Calculate the average which will be the measuring stick for further comparisons.

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Here is an example:

You have three participants that give 6, 8, and 9 correct answers..
Together they give 23 correct answers..
The average  is 23 : 3 = 7.6

The Interpretation:

Two of your people are above average, and one is below average, and each result shown as percentage points is an IQ.

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In a good test there are hundreds of participants. The average is set as 100. The problem is in the questions that you have to invent.
Don’t they lean a bit this way or that?
How do you rate imagination versus logics or memory versus speed?
Which faculty is most important? Important in what regard?
Will you need soldiers or teachers or scientists?

Next time you get a test score, don’t take it as the word of God.

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The results of an IQ test are often represented as a Gauss curve, a curve that typically looks like a hat, also called bell curve.

That curve became famous as the title of a book on intelligence tests. It also looks like Saint Exupéry’s drawing of a constrictor boa that swallowed an elephant: it begins flat, then bulges up, and ends again flat.

The flat parts show rare and strange results. The bulge shows frequent and normal results. The curve also shows how much deviation there is between normal and strange and whether the average results are frequent or not. How many data are close to the average? How big is the difference between the highest and the lowest results?

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Gauss used his curve to visualize astronomy data. The same graph could be helpful, for instance, to see the distribution of resources in a city or to monitor the levels of noise in your street or the changing density of traffic on a highway. –

Sometimes the curves are used to make a graph of people’s potentials, but they are not reliable.

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The serpents with and withoput the elephant inside are by Saint Exupéry. He is the war pilot that wrote “The Little Prince”.

The other drawings, also the one inserted into the photo below, are by Gary Olsenfor the Cartoon College.

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According to data found at Wikipedia, an IQ of 140 is the genius score, and they say that 1% of people in the world can reach that.

Wouldn’t this mean that in any little town of some 60 000 inhabitants there are some 600 geniuses …. doing nothing ?

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