On 11/01/12 18:19, Cristian Consonni wrote:
ReCAPTCHA already works in a way similar to this. Two
words are
presented but only one is known and actually serves to filtrate
accesses. They then collect answers for both words and if the test on
the first is passed (which indicates a human) then the answer for the
second is recorded. When a certain number of people agree on the
transcription of a previously unknown word then that transcription is
taken as good and used in future as a filter word.
I know. I was thinking on the basis that being so different, people
could cheat by giving a bad 'learning' word.
Originally, recaptcha showed two images apparently equal, although
recently it seems to have changed, and it's clear which is the test and
which the unknown.
Although we could even plainly make the second one optional, letting the
users choose if they want to help or not. We would get less trains but
of higher quality.
I believe the trickiest part is creating a system to
put results back
in Wikisource in a semi-automated way, but having "captcha reviewers"
may help.
I was just 'defering' that :)