Fig. 4From: Percentage-based Author Contribution Index: a universal measure of author contribution to scientific articlesDescriptive statistics of author contribution index (ACI, see Eq. (1)) Data from an online anonymous survey completed by 97 authors between 2014 and 2016. a Frequency distribution of ACI (log transformed) from survey respondents. b ACI (log transformed) in relation to research active time. c Average ACI (log transformed) in relation to job descriptionBack to article page