On 03 Aug 2000 06:45:45 GMT, [EMAIL PROTECTED] (DavidS9307)
wrote:
> I would like to collect data in a school on a survey form where the respondents
> enter only a code number to identify themselves. I would like the code number
> to be something that the participants will be able to remember for follow-up
> data collection in the near future, but I would also like to protect against
> identifying the participant even if the forms and coding scheme were disclosed,
> so I don't want to use birthdates, names of relatives, or SSNs. I had been
> thinking of using some number not generally known to anyone other than the
> participant, such as the last digit of their locker number at the school, to
> disguise a universal identifier by adding it to each of the last four digits of
> the SSN, but that seems rather clumsy. Does anyone have a suggestion for a
> good coding scheme? Thanks to all for any recommendations.
I don't know if you can fit it to your scheme, but one scheme that I
heard of - I have never seen it done - asked people to write down the
serial number from a dollar bill. Maybe you could hand out the bills?
Respondents can write down their numbers, or save their bills.
--
Rich Ulrich, [EMAIL PROTECTED]
http://www.pitt.edu/~wpilib/index.html
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