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
Neuropsychologia is an international interdisciplinary journal devoted to experimental and theoretical contributions that advance understanding of human cognition and behavior from a neuroscience perspective. The journal will consider for publication studies that link brain function with cognitive or emotional processes, or that exploit neural data to significantly advance cognitive and psychological theory. Studies that employ a purely behavioral approach in neurologically healthy participants are not appropriate for the journal unless the findings have a direct bearing on the understanding of the neural mechanisms or systems supporting cognition and behavior.
Neuropsychologia has a long history of publishing lesion-deficit studies, and these remain highly appropriate for the journal. Submission of papers describing the use of other methodologies - notably functional and structural neuroimaging, cognitive electrophysiology, and transcranial magnetic stimulation - is also strongly encouraged. Animal studies are also welcome, provided they have a direct and explicitly specified impact on understanding human cognition and behavior. Studies of clinical populations that are primarily descriptive, that are intended to characterize or elucidate a clinical disorder or disorders, or that evaluate a clinical assessment method or therapeutic intervention, are not appropriate for the journal. Special issues and Review Papers are published regularly with the aim of providing authoritative surveys of topics of major interest.
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