... effectiveness Navigational queries Query intents Retrieval performance evaluation Measurement The importance of search engines for finding relevant information on the world wide web is indisputable. Consequently, there is wide interest among researchers in the quality of search engine results...

... and Harman, 2000), at the cost of extra effort to build the pools. A. MacFarlane can be contacted at: andym@soi.city.ac.uk © Emerald Group Publishing Limited 2007 Worldwide web Information searches Retrieval performance evaluation Search engines Measurement Web search...

...). We describe the Okapi algorithm used in section 4, but first we give an overview of what passage retrieval actually is and the context in which we use it. Passage retrieval can take on a number of forms and we list some examples here: Text retrieval Retrieval performance evaluation Computers...