David, I wish you a lot of luck with your research. I have done lots of surveys of the kind you are using on both emets and non-emets and the data are elusive.
I also wish you would be more sensitive in talking to emets. The line "This will involve filling in some questionnaires online and keeping a record of each time you vomit over the next 2 years" was particularly disturbing, as if you expect that emets are eagerly awaiting the chance to vomit. Just the thought that someone is expecting them to vomit is apt to scare most emets away from your survey even if they were sympathetic toward the project in the first place.A more effective approach to reach emets would be to say "This will involve filling in a questionnaire online and then receiving follow-up questionnaires from time to time over a two-year period."If you will kindly read my "Frequently Asked Questions about Emetophobia" (the link is below), you will understand how disturbing the thought of vomiting is to emets. You just don't say "each time you vomit over the next two years" to an emet the way you might say "each time you visit the dentist over the next two years."
The data are apt to be scant anyway; according to surveys I've done for the Emetophobia FAQ, the average emet most recently vomited 12 1/2 years ago. Many of us have gone decades.
In a recent survey I did of the general population asking if they threw up in the past year, 70.3 percent said yes and only 29.7 percent said no. 84.6 of the women and 66.7 percent of the men said yes.In response to the follow-up question, do you think you will barf in the coming year, the result was exactly the same. This is a question one would not even think of posing to a group of emets. In terms of the past year question, only 20.9 percent of emets said yes.
Doug
To learn more about emetophobia, see
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