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Latest Impact Factor figures from Elsevier's Library and Information Science Journals

We are pleased to bring you the latest Impact Factor figures from Elsevier's Library and Information Science journals. Highlights include...

journal cover imageInternational Journal of Information Management
2009 Impact Factor
WAS
0.723
2010 Impact Factor
NOW
1.554
impact factor bar-chart
journal cover imageLibrary & Information Science Research
2009 Impact Factor
WAS
1.236
2010 Impact Factor
NOW
1.362
impact factor bar-chart
journal cover imageLibrary Collections Acquisitions & Technical Services
2009 Impact Factor
WAS
0.429
2010 Impact Factor
NOW
0.529
impact factor bar-chart

Calculating Impact Factors

WHAT IS AN IMPACT FACTOR?
The journal impact factor is a measure of the frequency with which the average article in a journal has been cited in a particular year. The impact factor helps you evaluate a journal's relative importance, especially when you compare it to others in the same field. The impact factor is calculated by dividing the number of citations in the current year to items published in the two previous years by the total number of items published in the two previous years.

Using Journal X as an example:
Cites in 2010 to items published in: 2009
2008
Sum
= 258
= 199
= 457
Number of items published in: 2009
2008
Sum
= 116
= 71
= 187
Calculation: Cites to recent items 457 = 2.444
Number of recent items 187

The 2010 Impact Factor for Journal X is 2.444

Journal Performance Measurements

Journal performance measurements offer a systematic, objective means to critically evaluate journals, and several indicators are available.

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