More than 150 prominent scientists and 75 scientific groups from around the world today took a stand against using impact factors, a measure of how often a journal is cited, to gauge the quality of an individual's work. They say researchers should be judged by the content of their papers, not where the studies are published.
Journal impact factors, calculated by the company Thomson Reuters, were first developed in the 1950s to help libraries decide which journals to order. Yet, impact factors are now widely used to assess the performance of individuals and research institutions. The metric "has become an obsession" that "warp[s] the way that research is conducted, reported, and funded," said a group of scientists organized by the American Society for Cell Biology (ASCB) in a press release. Particularly in China and India, they say, postdocs think that they should try to publish their work in only journals with high impact factors.
The problem, the scientists say, is that the impact factor is flawed. For example, it doesn't distinguish primary research from reviews; it can be skewed by a few highly cited papers; and it dissuades journals from publishing papers in fields such as ecology that are cited less often than, say, biomedical studies.