Judging Journals: How Impact Factor and Other Metrics Differ across DisciplinesQuinn Galbraith, Alexandra Carlile Butterfield, and Chase Cardon claim that Google Scholar accounted better for journals in non-English languages than Scopus and Web of Science and doubled the number of journals available compared to Scopus and tripled compared to Web of Science. Google Scholar has the highest percentage of journals classified in the areas of physical science, humanities, social science (tied with Scopus), education, engineering, and law. Compared to other metrics systems, Google Scholar’s high coverage of law journals (60%) is particularly impressive. The best indexed field was the life sciences at 82 percent, followed closely by the physical sciences and engineering at 76 percent and the social sciences at 75 percent. Business was also fairly well indexed, with more than half the journals indexed in every metric system. All the other disciplines—fine arts, law, education, and humanities—averaged at less than half indexed. With the highest rate of classification at 82 percent, the full range of academic journals in a discipline is not being wholly represented.