Implicit rating of retrieved information in an information search system

摘要: An information retrieval system allows a user to search database of informational items for desired item, and presents the result in form matching index entries order relevance. The accordance with principles present invention assigns relevance rating each without requiring an explicit input from respect usefulness or retrieved corresponding respective entries. When selects retrieves item through list presented by system, as search, selected is increased predetermined amount. further adjusted based on any actions takes subsequent initial selection if act indicates that may be less than what reflected increase Ratings are determined implicit suggestions usage rather input. In another aspect invention, ratings allowed decay over time minimize tendencies historical biased rating, provide more temporally accurate ratings. most recently accessed compared stale access threshold, older decreased reflect dated nature contained within item.