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Bibliometrics and Altmetrics

Definitions

Definitions

Author Index. They purpose of an author index is the assessment of the scholarly output an individual researcher in terms of author citation networks. An author index stands grounded in its ability to measure the research impact of the cumulative scholarly work of an individual researcher. Author level metrics, as a statistical metric, derives from article level metrics.  Although there are a number of author indexes, two are important for researchers. 

H-Index. A primary author level metric designed to measure research quality over time. The h-index is a statistic designed to account both the scholarly productivity and the research impact of the author. The h-author index for an individual author is calculated by scholarly output (total number of publications ranked in descending order) over the total number of citations attributed to each publication in the list. This provides a snapshot of an individual researchers’ performance.

The h-index, as a performance indicator, is attributed with having advantages and disadvantages.The advantages include: it is a simple composite indicator, which can be applied to the research performance of individual scholars; It combines citation impact with publication activity measures; and it directly correlates with other indicators of significance.

The disadvantages include: it puts new scholars at a disadvantage since publication output and observed citation rates require long term observations and remain relatively low for newly minted scholars; not useful for assessing different fields or discipline nor for the assessment of individual departments. 

G-Index. Since the h-Index does not account for highly cited publications, the g-Index is designed as a complementary author index. The g-Index is a statistical measure that accounts for highly cited scholarly works. It is calculated, given a set of articles, ranked in decreasing order of the number of citations that they received, the G-Index is the unique largest number such that the top g articles received together at least g2  citations

Sources:

American University Library

University of Oklahoma Libraries

University of Waterloo Library

 

Top Resources for Author Metrics

Top Resources for Metrics. The top databases that provide resources for calculating the h-Index include:

Web of Science. To find an author’s h-Index: Firsr perform an Author search in Web of Science. You will generate a list of titles published by the author. To locate the author's h-Index, go to upper right hand corner of records retrieved. Find the Create Citation Report and click on it. This will take you to the Citation Report. The second box to the left is the h-Index for the individual author. 

Scopus. Author search generally the best method to pull up citations. Search by Last Name, First Initial, and institution. Choose the appropriate author listed then click on Citation Overview, where the h-Index is listed in a box to the right. 

Google Scholar. It calculates the H-Index and its variant, the i10-Index for Authors. I10-Index is the number of articles with at least 10 citations. 

Metrics Toolkit. Helps you Navigate the Research Metrics Landscape. It is a web resource for researchers and evaluators by providing guidance for demonstrating and evaluating research impact. It includes a section on the h-Index

ORCID - Connecting Research to Researchers; Open researcher and ID contributor. Link your research identity at UNLV as your workplace or place of education.  

Sources:

American University; Scholarly Research Impact Metrics

Johns Hopkins University: Databases with h-Index.

University of Waterloo: Calculate your Academic Footprint: Author Profiles.

 

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