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Posted by Scott W. Spain on February 01, 2000 at 11:48:37:
In Reply to: Re: We will now ask you some screening questions... posted by Paul Curran on February 01, 2000 at 06:28:15:
Howdy Paul! Great to hear from you again.
Eliminating non-qualifed respondents from the sample is more of an economic reality -- you can't afford to interview everyone, but it would sure be nice to.
That's pretty much where I'm coming from too. Especially on low-incidence studies.
Perhaps what Daniel is saying is that on-line research removes a lot of the economic factors, so you may as well collect the screening and demo data for everyone, and simply remove the appropriate cases when doing the analysis.
That makes much more sense to me. Even though I started the thread, my mind wandered into telephone interviewing mode. After 12 years in the telephone data collection business, it's a hard frame of mind to get out of. With online I think this makes all the sense in the world. I often make the same argument for closed quotas. Unless it costs more in incentives, why boot respondents when a quota fills up? I think it's better to toss (or use as an augment) the interviews you don't need.
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