How representative are journals titles with Impact Factors compared to all academic journals in a given area of study.
The following is a quick and simple comparison for Management which I think gives some idea.
- The ISI Journal Citation Reports lists 79 journal titles with Impact Factors under the subject heading Management;
- Ulrich's Periodicals Directory lists 494 under the subject heading Management which are also refereed academic/scholarly journals;
- 57 of the titles included in the ISI Journal Citation Reports are also included in the 494 journal titles identified by Ulrich's – so there is some basis for comparing the two data sets.
Using a very rough and ready calculation comparing the two sets of data - 79/494 - there are 6 refereed academic Management journals for every Management title that has an Impact Factor.
A similar exercise for Nursing gives a similar result.
- The ISI Journal Citation Reports lists 32 journal titles with Impact Factors under the subject heading Nusing;
- Ulrich's Periodicals Directory lists 213 under the subject heading Medical Sciences - Nurses and Nursing which are also refereed academic/scholarly journals;
- All the titles included in the ISI Journal Citation Reports are also included in the 213 journal titles identified by Ulrich's – so there is a strong basis for comparing the two data sets.
Using the same rough calculation comparing the two sets of data - 32/213 - there are 6.6 (or 7 rounded up) refereed academic Nursing journals for every Nursing title that has an Impact Factor.