hi jeff,
interesting idea -
my thoughts on an alternative to the turing number are that it needs
to provide around 1 out of 10000 or higher odds against random guessing.
so a form with a drop down list would need to have 10000 choices to provide
such. the 6 digit number e-gold uses provides around 1 out of a million
odds of guessing. some sites use distorted english words on a background -
this is probably superior from the random guess angle but may be more prone
to user mis-entry.
maybe a way to do your drop down would be to have javascripted heirarchical
menu selection similar to e-bay category selection.
animal/plant/mineral ->
dog/cat/aardvark/snail
cactus/oak/fern
pebble/rebar/engine
etc. to arrive at 10000 incorrect selections.
also some possibilites having to do with persistence of human vision,
and animation are possible...
how about using i ching hexagrams, or selecting the most likely composer
of a .wav motif or painter of a few displayed stroke. yeah, right. :)
jay w.
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> Okay, so I bit off more then I can chew :) My main idea was to have a
> small image (cat, dog, sock, tree) and then people select what it is
> from a pop up menu. That's user friendly, but you still have to
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