What is an h-index? | How to calculate your h-index
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- Опубліковано 25 лип 2024
- You may wonder what in the world is an h-index. This video will explain what an h-index is, how it is calculated, and how you can get hold of your own h-index. Jorge E. Hirsch formulated the h-index in 2005. You’ll find a link to his very seminal publication below. Initially, the h-index was used as an individual metric, while these days, it is also used to determine the productivity and citation level of impact of a group or journal. The official definition of the h-index described by Hirsch (2005) is “the number of papers with citation number greater or equal to h”. However, you and I both know that this definition on its own does not make much sense, so I explain the definition in the video by way of two examples.
Although the h-index is a better metric than the total number of papers, there are challenges when using the h index to measure impact. It is suitable for comparing scholars working in the same field, but not for comparing those in different fields. This is because the h-index is influenced by the average number of references in a paper in the specific field, the average number of papers produced by each scientist in the field, and the size of the field in terms of the number of scholars/scientists. Also, if an author has a low number of publications but each of them is cited widely, the h-index won’t reflect the impact of that authors work correctly.
The good news is that Google Scholar, Web of Science and Scopus calculates your h-index on your behalf. Your h-index will differ from platform to platform, seeing that these platforms include different publications and their citations into their databases. Tell me, by leaving a comment in the comment box below this video, do you know of any other platforms which calculate an h-index? And which other citation metrics are you familiar with? Let us know so we can all learn from each other!
Hirsch 2005 seminal paper: www.jstor.org/stable/4152261?...
Google Scholar h-index: scholar.google.com/intl/en/sc...
Scopus h-index: blog.scopus.com/topics/h-index
Web of Science h-index: • Video
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Video is confusing for beginners.
the second step is to stack the number of citations from largest to smallest.
the third step is comparison. In first case H of his most cited articles has at least h citations so H=4, is correct, but explanation is not really clear.
I did'nt understand the second table there are 4 publications as well as the first table but you said there are 3 publications why ? and where is 3 citations come from ?
Ah no, there is a mistake in the second example which crept in when I removed the wrong slide. I truly apologise for the confusion and I'm grateful that you made me aware of it. I'm going to correct it asap. Thank you so much.
Hi Yasmin. I had a good look again this morning. The information in the video is correct. In that example, even though the author has 4 publications in total, the author has 3 publications that each has at least 3 citations, and therefore the h-index of 3. Let me know if this makes sense.
@@ResearchMasterminds I think the second example is a little confusing coz the second example has three citations and at least 4 citations in each, not 3. and another issue is why did you neglect the publication of two citations?
The h-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times. For instance, an h-index of 17 means that the scientist has published at least 17 papers that have each been cited at least 17 times. If the scientist's 18th publication was cited only 10 times, the h-index would remain at 17. If the scientist's 18th publication was cited 18 or more times, the h-index would rise to 18.
So... I hope now it is easy to understand why 4 and 3 in video...
@@VladLordDracula Why would it rise to 18 if the other 17 remained below 18?
This is confusing 😢 especially second table
I agree 100% 😊
@@ResearchMasterminds Thank you for your efforts.
Secont table is easy just to compared, just order the number of citations from largest to smallest
1-6
2-5
3-4
--------------------------------H=3 because article 3. has more then 3. citatations mean 4. (3.article-4xtimes citations)
4-2 - this has only 4.articles and just 2 citations must be minimum 4-4 citations.
In the video are two mistakes. Better deleted
Thanks for letting me know. Tell me what they are?