On Apr 26, 6:58 pm, Will Hardy <e.willha...@gmail.com> wrote:
> I would allow the multiple submissions, but make a note of any IP
> addresses to let you exclude the data in the analysis stage. From
> memory the following "meta" variables might be relevant:
> HTTP_CLIENT_IP, REMOTE_ADDR, HTTP_X_FORWARDED_FOR comma separated)
>
> Although I don't know who your users are, people behind a firewall
> will have the same IP, so will people who switch browsers or close
> cookie-cleaning browsers to complete the survey at another time. Plus
> by doing it this way, you may be able to stop the more determined
> participants, who would try methods you wouldn't be able to detect if
> they knew that their data weren't being accepted.
>
> If this is a more scientific survey, doing it this way helps you show
> that the data are valid (you can say in your report that X
> participants had the same IP address and have therefore been
> excluded).
>
> Cheers,
>
> Will
Thanks Will and Malcolm for the answers. That is just what I was
looking for. It works great.
Best,
Rex
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