Scientometric Indicators

Scientometric Indicators reflect the publication activity, characterize the scientific research activity.  

Journal Metrics

Impact Factor  

Scientific impact factor, which ranks scientific journals based on the citation. The officially recognized impact factor is generated by Thomson Reuters.

Calculation: the average number of citations received in a given year by articles published in that journal during the two preceding years.  

Access: The Journal Citation Report (JCR)  from the IP address of the University of Debrecen or after setting up Off-Campus Access.

Eigenfactor and Article Influence Score (AI)

Eigenfactor evaluates the influence of scholarly periodicals. It measures the value and prestige of scholarly journals by using citation data from Thomson-Reuters Journal Citation Reports (JCR).  

Not influenced by:  

  • Self-citations;
  • Journals that engage in opportunistic self- citation; 
  • Journals that publish fewer than 12 articles per year. 

Article Influence: determines the average influence of a journal’s article.  


SCImago Journal Rank (SJR)

This indicator measures scientific journals by the number of citations and the prestige or importance of the journals. 

Calculation: is based on Scopus data, measures the citations received during the three preceding years. Self-citing is omitted.  



This metric provides comprehensive and current insight into the citation impact of publications in Scopus. CiteScore is available for most active serial titles (book series, conference proceedings, etc.)


Source Normalized Impact per Paper (SNIP) 

This measure is based on Scopus, too. It allows comparison of journals published in different disciplines.   


Author Metrics and Article Metrics


A reference to a published source.

Types of Citations:

  • Author Self-Citation: The author refers to an article written by himself/herself. This type of citation has a very low value;
  • Dependent Citation: The author refers to an article in which s/he is a co-author;
  • Independent Citation: There is no overlap between the authors of the cited work and the referring authors. This type of citation has the highest value.  

Accessing citation data


Measures author productivity and citation impact. The index is based on the number of citations that the author has received and the quality of the reference journal.

Access: via Google Sholar, Web of Science, Scopus and MTMT research profile.


Updated: 2019.02.11.