Measuring Search-Engine Quality and Query Difficulty: Ranking with Target and Freestyle.

Robert M. Losee Lee Anne H. Paris

Published in: J. Am. Soc. Inf. Sci. (1999)

Keyphrases

query difficulty
search engine
web search
search quality
information retrieval
keyword search
web search engines
retrieval effectiveness
average precision
ranking functions
recent approaches
web pages
query logs
n gram
learning to rank
search result