SCI期刊影响因子分析(北京).ppt

期刊影响因子分析汤姆森科技信息集团中国办事处 JournalCitationReports Journalimpactfactor EssentialScienceIndicators Citationandcitationanalysis CitationAnalysisviaPeerAssessment 50yearsago Garfield E Citationindexesforscience Anewdimensionindocumentationthroughassociationofideas Science 122 3159 p 108 111 July1955 CitedReferencesassociationofideasofitsauthor CitationIndexesnewapproachtosubjectcontroloftheliteratureofscience 2004 CitedReferences 2000 1998 2001 1993 2003 TimesCited 2003 2004 CitedReferences Paper Article Citingpapers Howtodefine citation 利用引文分析进行科研评估的理论基础 NormativePerspectiveoncitations美国社会学家罗伯特 默顿 RobertK Merton 科学的规范结构 文献引用的动机Citationmotivation 原文献的科学价值Citation Impact Influence Importance Performance科学期刊在同行科学家的交流中起着根本的作用 即科学文献能够代表科学活动以及表现不同分支学科之间关系 在整个期刊系统中 可以区分出 重要 的国际性期刊学术文献被重要的期刊文献引用的次数是这一文献的影响或国际显著性的一种度量Moedetal Theuseofbibliometricdataforthemeasurementofuniversityresearchperformance ResearchPolicy 14 131 149 1985 Oppenheim C JournalofDocumentation 1995 引文分析的前提 WebofScience anditsoffspring WebofScience JournalCitationReports JournalImpactFactor Statsbyjournal Statsbyaddress EssentialScienceIndicators Baselines Customize ResearchServicesGroupNationalScienceIndicatorsInstitutionalCitationReportsTopicCitationReportsetc WebofScience anditsoffspring Article levelvs Journal leveldata ScienceCitationIndexExpanded WebofScience JournalCitationReports JournalImpactFactor Statsbyjournal JournalCitationReports独特的多学科期刊分析评价工具 自1997年以来的数据 提供基于引文数据的期刊评价指标显示出引用和被引期刊之间的相互关系帮助用户以定量的方式了解全球的学术期刊 利用JCRonWeb深入了解学术期刊 CalculationofJournalImpactFactor Example 2004ImpactFactorforNewEnglandJournalofMedicine 2002 2003 2004 366paperspublishedin2003 14147timescitedin2004 378paperspublishedin2002 14549timescitedin2004 378 366 14549 14147 744 28696 38 570 JournalCitationReports2004ScienceEdition ImpactFactorsonlytaketherecent3yearsintoconsideration Whataboutthefieldswithalongercitationspan 2004IF 38 570 Thejournalimpactfactorisameasureofthefrequencywithwhichthe averagearticle inajournalhasbeencitedinaparticularyear Theimpactfactorwillhelpyouevaluateajournal srelativeimportance especiallywhenyoucompareittoothersinthesamefield JournalImpactFactor AveragecitationcountinaparticularyearAssignedat journallevel AssignedtojournalsindexedinCitationIndexesSCIE ScienceCitationIndexExpanded SSCI SocialSciencesCitationIndex IncludedinJournalCitationReports databaseUpdatedannuallyHelpfulwhenevaluatingajournal srelativeimportanceNotintendedtoevaluateindividualpapers researchers WhyImpactFactor ComparisonofscholarlyjournalsJournalcollectiondevelopmentinalibraryDecision makingsupportforarticlesubmissionbyaresearcherEditorialpolicydevelopmentbyajournalpublisherProblemsinSIMPLEcomparisonofcitationcountsSize ofarticlespublishedinayear Frequency ofissuespublishedinayear ImpactFactor AVERAGEcitationcount WebofScience recordexample CitedReferences Itemscitedbythisarticle 29items TimesCited Howmanyarticlesarecitingthisarticle 350articles Recordsarecountedatjournal level thenincludedinJournalCitationReports LookupjournalinfoinJCR WhatyoucantellinJournalCitationReports Whichjournalspublishmostnumberofarticles Whichjournalsaremostcitedinparticulardisciplines Whichjournalshave highimpact inparticulardisciplines Whichjournalspublish hot topics Journal sself citationsReviewarticleratesCited citingrelationshipsofjournals JCRisnotforevaluatingindividuals papers Recognizeskewednatureofcitationdata Citationdistributionsarenotnormal thetypicalbell shapedcurve Apparentateverylevelofanalysis Citationdistributionsareextremelyskewed fewpapersorpeoplearecitedathighfrequency mostcitedlittle 67 papersarebelowtheaverage WebofScience searchconductedonSept28 2005 Misuseof ImpactFactor Ifirstmentionedtheideaofanimpactfactorin1955 Atthattimeitdidnotoccurtomethatimpactwouldonedaybecomethesubjectofwidespreadcontroversy IthasbeenusedconstructivelytoselectthebestjournalsforCurrentContents andtheScienceCitationIndex andforlibrarycollections However ithasbeenmisusedinmanysituations especiallyintheevaluationofindividualresearchers TheuseofJCRandJPIinmeasuringshortandlongtermjournalimpact PresentedbyEugeneGarfieldatCouncilofScientificEditorsAnnualMeetingheldinMay9 2000 http www garfield library upenn edu papers cseimpactfactor05092000 html EssentialScienceIndicatorsSM EssentialScienceIndicators ESIliststhetop1 ofscientistsandinstitutions andthetop50 ofcountriesandjournals alsoprovidesbenchmarksforevaluatingindividualpapers Countedbyscientist country institution journal WebofScience ScienceCitationIndexExpanded SocialSciencesCitationIndex Benchmarkingdataforpapers Benchmarkingdataforpapers Comparelikewithlike THISISTHEGOLDENRULEOFCITATIONANALYSISAlwayscompare appleswithapples notappleswithoranges Fieldaveragesaredifferent by10 1Timeaffectscitationcounts HighImpactPapersDatabase 1981 2004 ECRisonlyavailableinRSGcustomizeddatadelivery ECR ExpectedCitationRates istheaveragecitationcountofitemsthatarepublishedinthesamejournal inthesameyear andasthesamedocumenttype Summary CitationIndexesWebofScience JournalselectionprocessImpactFactorIncludedinJCRAveragecitationcountinaparticularyearforajournalOnlyaccountforrecentyearsHelpfulinevaluatingajournal srelativeimportanceNotintendedtoevaluateindividualpapers researchersCharacteristicsofcitationdataDifferentcitationpatternsbydisciplinesSkeweddistribution Benchmarksforresearchev