Content Factor: A Measure of a Journal’s Contribution to Knowledge
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{"title"=>"Content factor: A measure of a journal's contribution to knowledge", "type"=>"journal", "authors"=>[{"first_name"=>"Joseph", "last_name"=>"Bernstein", "scopus_author_id"=>"7402304371"}, {"first_name"=>"Chancellor F.", "last_name"=>"Gray", "scopus_author_id"=>"55539573200"}], "year"=>2012, "source"=>"PLoS ONE", "identifiers"=>{"pui"=>"365316220", "scopus"=>"2-s2.0-84864255300", "isbn"=>"1932-6203", "pmid"=>"22844500", "sgr"=>"84864255300", "issn"=>"19326203", "doi"=>"10.1371/journal.pone.0041554"}, "id"=>"b9fca518-1aff-3d58-95ac-56548b0c9dad", "abstract"=>"Impact Factor, the pre-eminent performance metric for medical journals, has been criticized for failing to capture the true impact of articles; for favoring methodology papers; for being unduly influenced by statistical outliers; and for examining a period of time too short to capture an article's long-term importance. Also, in the era of search engines, where readers need not skim through journals to find information, Impact Factor's emphasis on citation efficiency may be misplaced. A better metric would consider the total number of citations to all papers published by the journal (not just the recent ones), and would not be decremented by the total number of papers published. We propose a metric embodying these principles, \"Content Factor\", and examine its performance among leading medical and orthopaedic surgery journals. To remedy Impact Factor's emphasis on recent citations, Content Factor considers the total number of citations, regardless of the year in which the cited paper was published. To correct for Impact Factor's emphasis on efficiency, no denominator is employed. Content Factor is thus the total number of citations in a given year to all of the papers previously published in the journal. We found that Content Factor and Impact Factor are poorly correlated. We further surveyed 75 experienced orthopaedic authors and measured their perceptions of the \"importance\" of various orthopaedic surgery journals. The correlation between the importance score and the Impact Factor was only 0.08; the correlation between the importance score and Content Factor was 0.56. Accordingly, Content Factor better reflects a journal's \"importance\". In sum, while Content Factor cannot be defended as the lone metric of merit, to the extent that performance data informs journal evaluations, Content Factor--an easily obtained and intuitively appealing metric of the journal's knowledge contribution, not subject to gaming--can be a useful adjunct.", "link"=>"http://www.mendeley.com/research/content-factor-measure-journals-contribution-knowledge", "reader_count"=>29, "reader_count_by_academic_status"=>{"Unspecified"=>2, "Professor > Associate Professor"=>5, "Librarian"=>3, "Researcher"=>4, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>4, "Student > Postgraduate"=>2, "Student > Master"=>1, "Student > Bachelor"=>1, "Professor"=>5}, "reader_count_by_user_role"=>{"Unspecified"=>2, "Professor > Associate Professor"=>5, "Librarian"=>3, "Researcher"=>4, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>4, "Student > Postgraduate"=>2, "Student > Master"=>1, "Student > Bachelor"=>1, "Professor"=>5}, "reader_count_by_subject_area"=>{"Unspecified"=>3, "Environmental Science"=>2, "Medicine and Dentistry"=>1, "Agricultural and Biological Sciences"=>8, "Arts and Humanities"=>1, "Business, Management and Accounting"=>1, "Physics and Astronomy"=>1, "Psychology"=>1, "Social Sciences"=>5, "Computer Science"=>5, "Economics, Econometrics and Finance"=>1}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>1}, "Social Sciences"=>{"Social Sciences"=>5}, "Physics and Astronomy"=>{"Physics and Astronomy"=>1}, "Psychology"=>{"Psychology"=>1}, "Economics, Econometrics and Finance"=>{"Economics, Econometrics and Finance"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>8}, "Computer Science"=>{"Computer Science"=>5}, "Business, Management and Accounting"=>{"Business, Management and Accounting"=>1}, "Unspecified"=>{"Unspecified"=>3}, "Environmental Science"=>{"Environmental Science"=>2}, "Arts and Humanities"=>{"Arts and Humanities"=>1}}, "reader_count_by_country"=>{"United States"=>6, "Japan"=>1, "United Kingdom"=>1, "Mexico"=>1, "Germany"=>1}, "group_count"=>3}

Scopus | Further Information

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  • {"files"=>["https://ndownloader.figshare.com/files/605452"], "description"=>"<p>Importance Scores Assigned by the OKU Authors to a Sample of 10 Orthopaedic Surgery Journals, along with their Content and Impact Factors.</p>", "links"=>[], "tags"=>["scores", "assigned", "oku", "authors", "10", "orthopaedic"], "article_id"=>275936, "categories"=>["Medicine", "Science Policy"], "users"=>["Joseph Bernstein", "Chancellor F. Gray"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0041554.t003"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Importance_Scores_Assigned_by_the_OKU_Authors_to_a_Sample_of_10_Orthopaedic_Surgery_Journals_along_with_their_Content_and_Impact_Factors_/275936", "title"=>"Importance Scores Assigned by the OKU Authors to a Sample of 10 Orthopaedic Surgery Journals, along with their Content and Impact Factors.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-02-20 02:08:13"}
  • {"files"=>["https://ndownloader.figshare.com/files/605484"], "description"=>"<p>Content Factor is the total number of citations in a given year to all of the papers the journal had published up to and including the year in question, reported in “kilo-cites” (ie, thousands of citations). For example, the 2010 Content Factor for the journal <i>Clinical Orthopaedics and Related Research</i> was 28.68, meaning that in 2010 there were approximately 28,680 (28,676 to be precise) citations in the medical literature to papers that had (ever) been published in Clinical Orthopaedics and Related Research.</p>", "links"=>[], "tags"=>["factors", "orthopaedic", "journals", "highest", "listed"], "article_id"=>275979, "categories"=>["Medicine", "Science Policy"], "users"=>["Joseph Bernstein", "Chancellor F. Gray"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0041554.t002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Content_and_Impact_Factors_for_the_twenty_orthopaedic_surgery_journals_with_highest_Impact_Factors_2010_listed_in_order_of_highest_Content_Factor_/275979", "title"=>"Content and Impact Factors for the twenty orthopaedic surgery journals with highest Impact Factors, 2010, listed in order of highest Content Factor.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-02-20 02:08:27"}
  • {"files"=>["https://ndownloader.figshare.com/files/605522"], "description"=>"<p>The Impact Factor is calculated by dividing the number of current year citations to source items published in the given journal during the previous two years by the total number of source items; the Content Factor is the total number of citations in a given year to all of the papers the journal had published up to and including the year in question, reported in “kilo-cites” (ie thousands of citations).</p>", "links"=>[], "tags"=>["factors", "biomedical", "journals", "highest", "listed"], "article_id"=>276015, "categories"=>["Medicine", "Science Policy"], "users"=>["Joseph Bernstein", "Chancellor F. Gray"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0041554.t001"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Content_and_Impact_Factors_for_the_twenty_biomedical_journals_with_highest_Impact_Factors_2010_listed_in_order_of_highest_Content_Factor_/276015", "title"=>"Content and Impact Factors for the twenty biomedical journals with highest Impact Factors, 2010, listed in order of highest Content Factor.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-02-20 02:08:38"}

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