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Duplicate subject id

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abhi	abhi posted 4 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 114, Visits: 558	Hi, In two of my recent studies, I found two subjects having the same subject id/confirmation code. Most likely its the same subject repeating the study, as the other demographic info is the same. I was wondering that if someone clicks the link twice, won't they be given a unique id/confirmation code each time? Is there a way to avoid duplicate ids? (I used sequential confirmation code generation); If I use random generation will it solve ?). Thanks.
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Dave	Dave posted 4 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 105K	+x abhi - 3/11/2021 Hi, In two of my recent studies, I found two subjects having the same subject id/confirmation code. Most likely its the same subject repeating the study, as the other demographic info is the same. I was wondering that if someone clicks the link twice, won't they be given a unique id/confirmation code each time? Is there a way to avoid duplicate ids? (I used sequential confirmation code generation); If I use random generation will it solve ?). Thanks. It's likely the same person, and typically them having the same ID if they launch multiple times in a row is desirable (otherwise you could not readily see that it's the same person). I don't think there is a way to avoid this; if you have Inquisit generate the IDs -- whether random or sequential -- the ID is generated when a participant hits the experiment's start page. If the page is not refreshed, the ID will remain the same.
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