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Monday, April 09, 2012

Eleven Plus Chances


If only the eleven plus was an easy examination. We all hope that the questions that are asked are relevant and valid. After all parents buy a pack of papers and then wonder if the questions in the examination are actually going to be similar. But there is one little niggle in the minds of some parents – does the eleven plus examination actually select all the children who deserve a place?

The eleven plus may possibly, at times, select the wrong candidates – and reject the worthy ones.

Suppose that 50% of eleven plus candidates were suitable for a grammar school education. An ideal test would give the following results:


Eleven Plus Success
Eleven Plus Failure

High
50
0
50
Low
0
50
50

50
50
100

All those scoring high on the test would be deserving of a grammar school place.

None of the children scoring low would enjoy the benefits of a grammar school education.

If the selection ratio is only 1 in 10 then far fewer children would be able to pass the examination – and be successful.


Eleven Plus Success
Eleven Plus Failure

High
10
0
10
Low
0
90
90

10
90
100


It is easy to see how the cut off level must affect the chances of some worthy children. If the cut off rises to 33% then the chances of the test picking only the `perfect’ candidates can be lowered.



Eleven Plus Success
Eleven Plus Failure

High
33
17
50
Low
17
33
50

50
50
100


There is, however, one major caveat that needs to be considered. Very few parents are completely unrealistic about the child’s chances of passing the eleven plus. Children contemplating sitting eleven plus examinations are a remarkably select group. The parents of children sitting eleven plus examinations must therefore also be a remarkably select group.