@Joffm and @holch : i didn't understand why you don't like VV ? It's really the speediest way , you don't need to create a new survey ? What for ?
Export complete responses from the first survey and delete it, import in the 2nd survey : all responses are here. One and 2 day after : do same job etc ....

Denis

OK, gottit, thanks. That piece of the interface could do with some reworking. BTW what does VV stand for?

Generating dummy tokens was my first approach, but that would require dummy addresses, names, etc (these additional responses are going to be anonymous, for unrelated small-p-political reasons).

This is a set of undergraduate surveys, half a dozen questions. No requirement for anything beyond head counts, means and standard deviations.

Incidentally, is there a reason to append the data from the first survey to the second, instead of appending the data from the second survey to the first?

It's like you want .

Sometimes i use 3 survey too : one closed (by time), and others one with different question in each, some are same. The closed one get all response (but i hack response id to allowing update/not replace).

VV : a .... don't remind why it's named like this .....

Same here, Denis, same here. I don't understand why you don't like creating dummy tokens...

Your approach is relatively quick, I agree. And I understand it better now. I wouldn't say it is necessarily the "quickest" approach.

I normally prefer not to delete any data and rather create a few extra dummy tokens, then exporting a file, deleting the responses from the survey, open it, do the data entry and then import the old data. I would personally prefer to go via some dummy tokens that are also created very quickly. I think there is even a function in LS now, isn't it? And if not, you create a quick CSV file, upload it, done.

I guess it is just some kind of personal preference and "workflow" thing.

I normally prefer not to delete any data : +1 here

In fact : i think dummy token are OK, but need a lot of manual update : and all manual update are unsure.