First 20 Precision among World Wide Web Search Services ( Search Engines )
نویسنده
چکیده
Five search engines, Alta Vista, Excite, HotBot, Infoseek, and Lycos, are compared for precision on the first 20 results returned for 15 queries, adding weight for ranking effectiveness. All searching was done from January 31 to March 12, 1997. In the study, steps are taken to ensure that bias has not unduly influenced the evaluation. Friedmann’s randomized block design is used to perform multiple comparisons for significance. Analysis shows that Alta Vista, Excite and Infoseek are the top three services, with their relative rank changing depending on how one operationally defines the concept of relevance. Correspondence analysis shows that Lycos performed better on short, unstructured queries, whereas HotBot performed better on structured queries.
منابع مشابه
Are Pay for Performance Search Engines Relevant? Authors
Pay for performance (PFP) search engines, like their “traditional” counterparts (e.g. Google), provide search services for documents on the World Wide Web. These search engines however rank documents not on content characteristics but according to the amount of money a vendor is willing to pay when a user visits a Web site appearing in the search results page. A study was conducted to compare t...
متن کاملMeasuring the Effectiveness of the WWW Search Engines
Eight World Wide Web search engines are compared on the basis of traditional Information Retrieval measurements Recall and Precision. It is found that the most significant factor that is correlated to precision is the topic of the query. Significant groupings at the level of the search engines themselves are found for both recall and precision. The paper also categorizes search engines by infor...
متن کاملA Technique for Improving Web Mining using Enhanced Genetic Algorithm
World Wide Web is growing at a very fast pace and makes a lot of information available to the public. Search engines used conventional methods to retrieve information on the Web; however, the search results of these engines are still able to be refined and their accuracy is not high enough. One of the methods for web mining is evolutionary algorithms which search according to the user interests...
متن کاملMeasuring the Effectiveness of Public Search Engines on Thai Queries
This paper compares the retrieval performance of seven public search engines on Thai queries by using a blind evaluation. Two of the engines used in this study are Thaifocused search services, while the remaining engines are large, commercial search engines that have wider collections of web data and support several languages. The results are compared by Mean average precision (MAP) and Mean re...
متن کاملA New Hybrid Method for Web Pages Ranking in Search Engines
There are many algorithms for optimizing the search engine results, ranking takes place according to one or more parameters such as; Backward Links, Forward Links, Content, click through rate and etc. The quality and performance of these algorithms depend on the listed parameters. The ranking is one of the most important components of the search engine that represents the degree of the vitality...
متن کامل