Could there be something else but not a captcha? Like a hidden honeypot
field? Here is one point of info, but there is lots of info about these
online. I am not sure, but I think this approach might still work.
https://www.scorchsoft.com/blog/recaptcha-alternative-honeypot-spam-prevention/
Jaster
On 2017-10-04 11:16, sajolida wrote:
>> But here it looks like you can use captchas:
>> https://manual.limesurvey.org/Survey_settings#Publication_.26_access
>
> Yep, that what I meant: you can put a Captcha *before* the form to
> protect accessing it but I didn't find a way of putting a Captcha *at
> the end* of the form, when submitting it; which I thought would lead to
> more people filling it up.
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