SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field.
SJR is a prestige metric based on the idea that not all citations are the same. SJR uses a similar algorithm as the Google page rank; it provides a quantitative and a qualitative measure of the journal’s impact.
The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years.
© Thomson Reuters Journal Citation Reports 2015
To calculate the five year Impact Factor, citations are counted in 2014 to the previous five years and divided by the source items published in the previous five years.
© Journal Citation Reports 2015, Published by Thomson Reuters
Experimental Gerontology is a multidisciplinary journal for the publication of work from all areas of biogerontology, with an emphasis on studies focused at the systems level of investigation, such as whole organisms (e.g. invertebrate genetic models), immune, endocrine and cellular systems, as well as whole population studies (e.g. epidemiology). The journal also publishes studies into the behavioural and cognitive consequences of aging, where a clear biological causal link is implicated.
Studies aimed at bridging the gap between basic and clinical aspects of gerontology, such as papers on the basic aspects of age-related diseases, are welcomed, as is research orientated toward the modulation of the aging process.
Manuscripts on social aspects of aging and reports on clinical studies do not fall within the scope of the journal.
In addition to original research manuscripts, short reports, reviews, mini-reviews, commentaries, perspectives, meeting reports and opinions on controversial subjects are published."
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