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Date:   Sun, 23 Jan 2005 09:39:59 -0500
Reply-To:   Tiffola@aol.com
Sender:   "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:   "Tiffany S. Perkins" <Tiffola@aol.com>
Subject:   Sponsor Bias
Content-Type:   text/plain; charset=iso-8859-1

Has anyone heard of a rule of thumb regarding how much scores attributed to the sponsor of a survey should be "discounted?"

For example, if an insurance company does a survey of its clients via telephone interviews and identifies itself as the sponsor and at some point during the interview, asks the participants to state the 2 insurance companies they feel are #1 and #2, it is probable that the sponsor will get the highest #1 percentage.

Is there some objective way to compare % for all of the stores that are selected, while taking into account the bias toward the sponsor?

Any suggestions or references would be greatly appreicated.

Thank you.

Tiffany Perkins-Munn, Ph.D.


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