National rankings in psychiatry/psychology based on citations

Data provided by Thomson Scientific from its Essential Science Indicators, 1 January 1997–31 October 2007

May 29, 2008

Rank per paper/Nation Papers CitationsImpact
1United States 120,712 1,355,263 11.23
2 England23,567 257,136 10.91
3 Wales1,863 20,093 10.79
4 Canada16,384 171,3 10.45
5 Scotland2,711 ,894 10.29
6 The Netherlands8,893 88,362 9.94
7 Italy4,201 40,691 9.69
8 Finland2,121 20,085 9.47
9 New Zealand2,226 20,896 9.39
10 Sweden3,310 29,817 9.01
11 Denmark1,296 11,644 8.98 12
13 Australia10,024 83,128 8.29
14 Israel4,014 32,706 8.15
15 Ireland979 7,887 8.06
16 France5,396 41,889 7.76
17 Norway1,901 14,364 7.56
18 Austria1,311 9,802 7.48
19 Germany15,773 114,435 7.26
20 Switzerland2,739 18,917 6.91

This ranking should be recognised as distinctly different from Thomson Scientific’s impact factor rankings, which are presented in the Journal Citation Reports issued each year. The impact factor is calculated as citations in Year 3 to a journal’s contents in Years 1 and 2, divided by the number of so-called citable items (regular articles and reviews) in Years 1 and 2. Thus, the above ranking reveals longer-term impact (citations per paper). The data for the multidisciplinary journals listed – Science, Nature and the Proceedings of the National Academy of the USA – take into account only those articles that have been classified by Thomson Scientific as molecular biology and genetics papers.

The data in the table (left) has been extracted from the Thomson Scientific’s Essential Science Indicators database. This database, currently covering the period January 1997 to December 2007, surveys only journal articles (original research reports and review articles) indexed by Thomson Scientific. Articles are assigned to a category based on the journals in which they were published and Thomson Scientific’s journal-to-category field definition scheme. Both articles tabulated and citation counts to those articles are for the period indicated. Here our ranking of journals in molecular biology and genetics is by citations per paper, among journals that collected 50,000 or more citations, to reveal weighted impact. Essential Science Indicators lists journals ranked in the top 50 per cent for a field over a given period, based on total citations. In molecular biology and genetics, 135 journals are listed, meaning 0 journals in this field were surveyed. Thirty journals earned at least 50,000 citations.

For more information on Thomson Scientific’s Essential Science Indicators, see http://scientific.thomson.com/products/esi. For more information on Thomson Scientific, see http://scientific.thomson.com.

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