Instructions for calculating earlier years may be found at. Journal citation reports jcr is a tool that keeps track of the numbers of citations to articles published in toptier scholarly journals in the hard and social sciences. Impact factors are calculated yearly starting from 1975 for journals listed in the journal citation reports jcr. Impact factor 5year impact immediacy index rank abbreviatedjournaltitle issn total cites articles 33 acta agr scand bs p 09064710 262 0. If you hear people talking about a journals impact factor, jcr is where the impact factor is found. As per the jcr2015, there are 123 impact factor if journals in this subject category. The top whisker is the smaller of the following two values. Horizontal lines above and below the box, called whiskers, represent maximum and minimum values.
The report would provide at scale what had required painstakingly manual analyses. In the following figure, i plot total citations for 228 elife articles published in 20. Hkul homepage electronic resources browse by format citation reports journal title. Impact factor 5year impact immediacy index rank abbreviatedjournaltitle issn total cites articles 67 acta geol pol 00015709 415 0.
This suggests that, on average, the majority of citations do. Incites journal citation reports page 6 of 18 impact metrics. Jul 15, 20 elsevier, a worldleading provider of scientific, technical and medical information products and services, today announced the highlights of its journal impact factor performance in 2012. Sep 01, 20 impact factors are published in the journal citation reports jcr, and in the most recent jcr available 2012 when this editorial was written, there were 103 nursing journals in the science. Median impact factor university libraries, george mason. The impact factor fi of a journal as provided by thomas reuters uses a tally period of one year and citation window of two. Horizontal lines above and below the box represent maximum and minimum values that are no more than 1. For example, the jcr also includes a fiveyear impact factor, which is calculated by dividing the number of citations to the journal in a given year by the number of articles published in that journal in the previous five years. However, as was explained a year ago azar, 2016, the impact factors reported by jcr do not take into account. Development of memristor based electronic synapse device for neuromorphic applications view project dr. Isi journal impact factor 2008 suranaree university of. The journal if indicates the average number of times articles published two years ago were cited in the jcr year. Here is a list of impact factors recorded for a range of psychology journals. Google scholar metrics was established in april 2012 and ranks journals using the h.
The horizontal line that intersects the box is the median impact factor for the category. Elsevier, a worldleading provider of scientific, technical and medical information products and services, today announced the highlights of its journal impact factor performance in 2012. Journal cited halflife median age of the articles that were cited in the jcr year. We present trends for the mean impact factor of the. Some of the authors of this publication are also working on these related projects. Factor highlights impact factor 5year impact factor immediacy index articles cited halflife engenfactor tm score article influence tm score journal citation reports jcr 2011 science edition aquacult int 09676120 0.
Designed as one tool to measure the relative importance of a. Impact factor journals in statistics and probability. The 2016 edition of journal citation reports jcr was recently released, reporting an impressive improvement over last year for the journal of behavioral and experimental economics. Journal impact factor 2016 jcr technical report august 2016 doi. The 2019 edition of the journal citation reports jcr published by clarivate analytics provides a combination of impact and influence metrics from 2018 web of science source data. The maximum, median, and interquartile range iqr of the current impact factor and. Abstract objectives a journal impact factor represents the mean number of citations per article published. With the exception of the social psychology subject category, communication journals score quite well over time in their median impact factors. Journal impact factor 2015 impact factor list 2015. The impact factor relates to a specific time period.
Hkul homepage electronic resources browse by format citation reports. The journal impact factor extenuates the significance of absolute citation frequencies. Journal impact factor 2015 impact factor list 2015 2014. On moose and medians or why we are stuck with the impact factor. Impact factor immediacy index articles cited halflife engenfactor tm score article influence tm score journal citation reports jcr 2011 science edition biosemioticsneth 187542 38 0. Science journal impact factor sci journal the median impact factor is the median value of all journals impact factors in the subject category. Impact factors of psychology journals psychology wiki fandom.
Impact factor 5year impact factor immediac y index articles cited halflife eigenfacto r score article influence score jcr. You can use the median impact factor of all journals in a particular discipline reported in jcr as a baseline for comparing the impact factors of specific journals in that. It alleviates the advantage of large journals over small journals because large journals circulate a larger body. The primary indicator of the jcrthe journal impact factor jif has received global.
The impact factor if published by thomson reuters annual journal citation reports jcr remains to be a popular bibliometric index. The impact factor was devised by eugene garfield, the founder of the institute for scientific information isi. Download free list journals impact factor 2012 list journals impact factor 2012. Median impact factor islamic azad university, isfahan. Incites journal citation reports page 6 of 18 impact metrics total cites 326 journal impact factor 0. The most wellknown indicator in the jcr is the journal impact factor jif. The list of impact factor journals in the subject category of statistics and probability is being shared here. The 2017 data will be made available in the 2018 journal citation reports release. We analyzed all data available in january 2012 from the jcr online. The purpose of this post is not to further the antics and showmanship that accompany any discussion about metrics, but to describe why we are stuck with the impact factor as it is currently calculated for the foreseeable future. According to the 2012 journal citation reports jcr published by thomson reuters, elsevier saw 53% of its journal impact factors increase from 2011 to 2012. Journal impact factor 2014 impact factor list 2012. Low impact factor group impact factor into components the impact of a journal is a gauge of the number of times research papers in an established count period cite papers published during a previous citation window. Of the 72 communication journals in ssci jcr, ct ranked 22.
The annual jcr impact factor is a ratio between citations and recent citable. This release of journal citation reports provides 2016 data. Designed as one tool to measure the relative importance of a journal, impact factors are o. Emergency medicine journal impact factor and change. The impact factor if or journal impact factor jif of an academic journal is a scientometric index that reflects the yearly average number of citations that. Elsevier announces 2012 journal impact factor highlights. Request pdf on jul 22, 20, paul cummins and others published the journal. Table 10 displays the median impact factor data from sscijcr for each of these subject categories from 20082012. Scopus matches citations to articles rather than just counting the total citations for a journal, so are arguably able to provide a better dataset and a more transparent metric.
Journal impact factor 2012 journal impact factor 2011 name of the publisher 1 international journal of engineering science issn. Addressing the impact factors of nursing education journals. Jcr years impact factor w ithout journal self cites x x x x x x x 0. Aggregate impact factor citation rate of the average article in a subject category use as benchmarking tool to compare a journal to its overall subject category. If the impact factor of a journal is lower than the median impact factor in the discipline, subfield, or interdisciplinary field it serves, this may mean that it less important or influential than most of the other journals serving that scholarly community. Median impact factor the impact factor midpoint for journals in the category. You can use the median impact factor of all journals in a particular discipline reported in jcr as a baseline for comparing the impact factors of specific journals in that discipline. A list of journals receiving their first impact factor is available here. The clarivate analytics impact factor web of science group. Hence, the commonly used jcr impact factor is a proprietary value, which is defined and. Impact factors are based on the 2012 journal citation reports jcr impact. Of the 72 communication journals in sscijcr, ct ranked 22. A complete list of the titles covered in this years jcr is available here. On moose and medians or why we are stuck with the impact.
Journal of behavioral and experimental economics elsevier. Kellner and others published a closer look at the impact factor jcr 2012. Cited year 2017 2016 2015 2014 20 2012 2011 2010 2009. A timeperiod filter of 19802012 will display the 2012 jcr indicator. The journal citation reports jcr is a database for journal evaluation published by the thompson corporation. Incites journal citation reports page 6 of 17 impact metrics total cites 411 journal impact factor 0. The median impact factor is the median value of all journals impact factors in the subject. Impact citing journal all yrs 2018 2017 2016 2015 2014 20 2012 2011 2010 2009 rest all journals 326 3 28 38 27 21 20 16 22 31 25 95 all.
The median impact factor is the median value of all journals impact factors in the subject category. Table 10 displays the median impact factor data from ssci jcr for each of these subject categories from 2008 2012. The report includes 11,877 journals from 81 countries. Journal impact factor 2014 impact factor list 2012 20.
The evolution of dental journals from 2003 to 2012. Emergency medicine journal impact factor and change compared. Impact factors of psychology journals psychology wiki. A survey published in 2012 indicates that coercive citation has been. Incites journal citation reports page 1 of 17 2018 journal performance data for. Cited year 2017 2016 2015 2014 20 2012 2011 2010 2009 2008 2007 all. Institute for scientific information isi has released journal citation report jcr for 2015. Abstract objectives a journal impact factor represents the mean number of. Apr 12, 2016 we are only stuck with the impact factor because funders, institutions, authors and therefore publishers, are unwilling to embrace any of the other metrics on offer.
1118 986 401 1283 772 567 930 174 293 1112 142 379 741 1368 583 1032 472 380 982 597 327 75 234 1030 1480 1114 1338 953 1051 1085 189 303 1011 795 427 155 1282 1282 648 404