Quartiles in JCR on the InCites Platform
Quartiles are defined as the following:
X = the journal rank in category according to the metric (Journal Impact Factor, Total Citations, etc)
Y = the number of journals in the category.
Z = Percentile rank (X/Y)
Q1: 0.0 < Z ≤ 0.25
Q2: 0.25 < Z ≤ 0.5
Q3: 0.5 < Z ≤ 0.75
Q4: 0.75 < Z
Where quartile data differs between JCR on the Web of Science platform and JCR on the InCites platform, the latter should be the source of record for official quartiles.