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Excite Relevance Feedback
Spink et al. 2000
Only about 4% of query sessions from a user used relevance feedback option
Expressed as “More like this” link next to each result
But about 70% of users only looked at first page of results and didn’t pursue things further
So 4% is about 1/8 of people extending search
Relevance feedback improved results about 2/3 of the time
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