In 1990, nearly half of the top 5 percent of articles—those that received most citations over the following 2 years—were published in the top 5 percent highest impact factor journals. But by 2009 that ...

The Journal Impact Factor is defined as all citations to the journal in the current JCR year to items published in the previous two years, divided by the total number of scholarly items (these ...

cataloging journals impact factors’, and shuffling in the top few spots have some analysts scratching their heads. Specifically, the publication with second highest impact factor in the “science” ...

Details of this service are provided here. These journals publish selected research of the highest quality and impact in their specific disciplines. They publish papers online weekly, with an ...

Its 2010 impact factor was 25.430, making it the highest-cited research journal in preclinical medicine. It is also among the highest impact of primary (non-review) scientific journals.