Semana 1- Complemento A1 - Sobre Dogpile

(*) Findings Highlight Value of Metasearch

The overlap research conducted in April 2007, which measured the overlap of first page search results from Google, Yahoo!, Live, and Ask, found that only 0.6 percent of 776,435 first page search results were the same across these Web search engines. The April 2007 overlap study expanded on the April 2005 and July 2005 overlap studies. Here’s where the combined overlap of Google, Yahoo!, Live and Ask stood as of April 2007:

• The percent of total results unique to one search engine was established to be 88.3%.
• The percent of total results shared by any two search engines was established to be 8.9%.
• The percent of total results shared by three search engines was established to be 2.2%.
• The percent of total results shared by the top four search engines was established to be 0.6%. 

Other findings from the study of overlap across Google, Yahoo!, Live and Ask were: Searching only one Web search engine may impede ability to find what is desired.

• By searching only Google a searcher can miss 72.7% of the Web’s best first page search results.
• By searching only Yahoo! a searcher can miss 69.2% of the Web’s best first page search results.
• By searching only Live a searcher can miss 69.9% of the Web’s best first page search results.
• By searching only Ask a searcher can miss 73.0% of the Web’s best first page search results.

Majority of all first results page results across top search engines are unique.

• On average, 69.6% of Google first page search results were unique to Google.
• On average, 79.4% of Yahoo! first page search results were unique to Yahoo!
• On average, 80.1% of Live first page search results were unique to Live.
• On average, 75.0% Ask first page search results were unique to Ask.

Different Engines, Different Results. Web Searchers Not Always Finding What They’re Looking for Online. A Research Study by Dogpile.com   In Collaboration with Researchers from Queensland University of Technology and the Pennsylvania State University
April 2007