Script Summary: This rough, yet useful, Firefox GreaseMonkey script will enable you to automatically display some of the most known citation indices (h-index, g-index, e-index) for any author queried on Google Scholar. <B>This page is no longer maintained. See https://addons.mozilla.org/en-US/firefox/addon/45283 for getting the latest version of Scholar H-Index Calculator.</B>
This page is no longer maintained.
See https://addons.mozilla.org/en-US/firefox/addon/... for getting the latest version
of Scholar H-Index Calculator.
This rough, yet useful, Firefox GreaseMonkey script will enable you to automatically display some of the most known citation indices (h-index, g-index, e-index) for any author queried on Google Scholar.
Now available as Firefox addon: https://addons.mozilla.org/en-US/firefox/addon/...
Firefox addon created using the Greasemonkey Script Compiler: http://arantius.com/misc/greasemonkey/script-co...
Installation Notes
To have accurate results, set your Google Scholar preferences on the number of results to 100.
The script currently processes just the displayed result page, and, as such, does not currently work for persons having enormous (h or g)-index (h or g > 100).
If you aim at computing your own indices values accurately, I strongly suggest to use the "Advanced Scholar" feature and fill the "Return articles written by.." field. Also you should restrict search to your field of experience.
Automatically browsing result pages following the first one violates Google
terms of service, and thus this feature is currently not implemented.
delta-H and delta-G
These two values measure the minimum number of citations missing in order to increment the current h-index (g-index, respectively), by 1.
In the case of delta-h this is sum_(1,h+1)[max((h+1) - c[i],0)], where c[i] is the number of citations for the paper in position i, and h is the current h-index.
delta-G is computed as (g+1)^2 - sum(1,g+1)c[i].
delta-H and delta-G should be a measure of how difficult would be for the author at hand to increase his/her h and g-index. Note however that the range of delta-h is relatively small (in the worst case, delta-h= 2h+1). Note that a value of delta-H equal to, e.g., 2, does not mean 2 more generic citations are needed for increasing the h-index, but 2 more citation on *particular* papers (usually the one in position h+1, and some other paper right in the positions previous to h+1).
Normalized Values
Normalized values (the second row of data which is displayed) are computed by normalizing
the number of citations found per each paper. That is, if paper i has been cited t times,
and has been written by k authors, its number of normalized citations is t/k.
All other indices values are computed considering this normalized values. In particular
the normalized h-index corresponds to h_{I,Norm} of Publish or Perish.
Due to limitations on the Google Scholar output format, Scholar H-Index truncates to 4 the author count for papers having more than 4 authors.
Support for CiteseerX
From version 1.3, a limited support for CiteseerX has been introduced. CiteseerX reports also the number of self citations, so this makes easy to compute indices after cleaning self citations.
When querying on citeseerX, You might indeed notice a second row which shows indices values computed after cleaning self-citations.
Note that at the moment values are computed based on the 10 results displayed, so their value might turn out to be an excessive approximation.
Usage
After installation, whenever you submit a query to scholar, you should automatically see the corresponding citation indices values on top of the page.
Note that computed indices values might differ from those of software tools like Publish or Perish. This latter program is hardwired to query scholar.google.com no matter which is your actual locale. Results from your local google.* might differ.
Version History
Dec 22th, 2009. 1.4.3 Adapted to new Google Scholar output format
Nov 26th, 2009. 1.4 Added radiobutton for changing the query type on-the-fly and improved author parsing.
Nov 21th, 2009. 1.3.3 Added on hover tooltips.
Nov 19th, 2009. 1.3.2 Improved appearance. Now a link to "ask with 100 results" pops up
if h-index or g-index are not computer properly.
Nov 17th, 2009. 1.3 Introduced normalized indices and support for CiteSeerX.
Oct 26th, 2009. 1.2.3 Introduced checks for overflow of h,g,e,deltah,deltag values.
Oct 25th, 2009. 1.2.2 Cosmetic changes to the page appearance.
Oct 21th, 2009. 1.2.1 A minor fix on delta-H computation.
Oct 20th, 2009. 1.2. Introduced delta-H and delta-G. Minor fixes.
Oct 16th, 2009. 1.1.1. Fix bug on e-index computation.
Oct 11th, 2009. 1.1. Fix bug related to Google Scholar not strictly respecting citation descending order. Fix some citation values evaluated as NaN.
