Journal evaluations: Are they really evaluations of authors?

Investigated whether particular methods of journal evaluations are biased in favor of either natural science (NSC) or social science (SSC) psychology journals by comparing the mean number of authors per article and pages per journal in 40 NSC and SSC psychology journals. There were significant differences across the 2 types of journals with regard to number of authors per article and the mean number of pages attributable to each author. The hypothesis that NSC articles have more authors than SSC articles was confirmed.