#106 match results from two completed surveys of the same people

[James Crook]

I would like to able to survey the same set of people
twice or more times and then compare results.

For instance, survey a group before and after a
training conference to see how their thoughts have changed.

Surveys could be matched by a unique field that users
enter each time, like email address (or employee id etc)

It would be good to have two ways of showing the
resulting data (same as for single surveys):

1/ individual mode - shows for each respondant both/all
the surveys concatenated into one long survey results page.

2/ collaborative mode - shows the totals for both
surveys concatenated into one long results page.