The CAD works by you staring at a flashing grid and waiting for a coloured smaller grid to move from one corner to the other, the start of which is signified by an audio tone. When you've identified which corner the coloured grid is moving to you press a corresponding Left - Right - Top - Bottom button on the control box. If you get the right one you get a point, enough points you get a prize.
The trouble with this is that each selection has a one in four chance of getting it right so whilst statistically improbable, like any 'game of chance' you may be lucky enough to get it right every time even if you are totally colour blind and can't make out any of the coloured grids. Theoretically, it could be passed by a blind person.
So they're trying to replace tests which they reckon are unreliable with one which can be guessed, even with your eyes closed. Even if they watch you to make sure your eyes are open you could still guess correctly.
This has been developed to remove any and all risks of a pilot failing to identify correctly a colour critical safety task so how on earth can you have a test which has any element of chance in it?
This is
'pure science' for you. ' Pure b******s ' more like!!
Give me strength!!
