Re: "Anonymous" survey with user matching

Hi,

we use for something like this a "human generated" string, an input
field with, let's say, the fist two letters of the respondent mother's
first name, the month's day of the respondent birth and the house
number. In the most cases this is unique and anonymous and you can match
the cases.

Best regards
Clemens




Ross Richardson wrote:
> A group here is interested in conducting two surveys (initial and
> followup) and, whilst they wish the respondents to remain anonymous,
> they wish to be able to match respondents between the surveys.
>
> Has anyone advice on how this might be achieved?
>
>
> I'm thinking of requiring authentication, then including in the results
> data some non-identifying value derived from the username - for example,
> an MD5 hash of the concatenation of some secret string and the username.
>
> In terms of practical implementation, I've only just started
> experimenting with perl snippets and have run into the problem that
> others have noted: the following doesn't work...
>
> 	<SUBMIT>
> 	{|
> 		$session->setValue("user_id", "some_value");
> 	|}
> 	</SUBMIT>
>
> Assistance would be greatly appreciated!
>
> rlr
>   
Skickat av Clemens Gruber <[email protected]>
till survey-discussion