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
Personality and Individual Differences is devoted to the publication of articles (experimental, theoretical, review) which aim to integrate as far as possible the major factors of personality with empirical paradigms from experimental, physiological, animal, clinical, educational, criminological or industrial psychology or to seek an explanation for the causes and major determinants of individual differences in concepts derived from these disciplines. The http://www.journals.elsevier.com/personality-and-individual-differences/editorial-board/editors are concerned with both genetic and environmental causes, and they are particularly interested in possible interaction effects. Ultimately they believe that human beings are bio-social organisms and that work on individual differences can be most fruitfully pursued by paying attention to both these aspects of our nature. They believe that advances are more likely to be made by the use of the hypothetical-deductive method, though empirical data based on sound research and providing interesting new findings, would of course not be rejected simply because they might not have a good theoretical underpinning. All in all, the traditional type of work on traits, abilities, attitudes, types and other latent structures underlying consistencies in behavior has in recent years been receiving rather short shrift in traditional journals of personality; Personality and Individual Differences aims to reinstate it to its proper place in psychology, equal in importance with general experimental work, and interacting with it to make up a unitary science of psychology.
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