Source: http://link.springer.com/article/10.1007/s11192-015-1608-4
A comparison of 17 author-level
A comparison of 17 author-level bibliometric indicators for researchers in Astronomy, Environmental Science, Philosophy and Public Health in Web of Science and Google Scholar - Online First - Springer
A comparison of 17 author-level
bibliometric indicators for researchers in Astronomy, Environmental
Science, Philosophy and Public Health in Web of Science and Google
Scholar
Abstract
Author-level bibliometric indicators are becoming a standard tool in
research assessment. It is important to investigate what these
indicators actually measure to assess their appropriateness in scholar
ranking and benchmarking average individual levels of performance. 17
author-level indicators were calculated for 512 researchers in
Astronomy, Environmental Science,
Philosophy and Public Health. Indicator scores and scholar rankings
calculated in Web of Science (WoS) and Google Scholar (GS) were
analyzed. The indexing policies of WoS and GS were found to have a
direct effect on the amount of available bibliometric data, thus
indicator scores and rankings in WoS and GS were different, correlations
between 0.24 and 0.99. High correlation could be caused by scholars in
bottom rank positions with a low number of publications and citations in
both databases. The hg indicator produced
scholar rankings with the highest level of agreement between WoS and GS
and rankings with the least amount of variance. Expected average
performance benchmarks were influenced by how the mean indicator value
was calculated. Empirical validation of the aggregate mean h-index
values compared to previous studies resulted in a very poor fit of
predicted average scores. Rankings based on author-level indicators are
influenced by (1) the coverage of papers and citations in the database,
(2) how the indicators are calculated and, (3) the assessed discipline
and seniority. Indicator rankings display the visibility of the scholar
in the database not their impact in the academic community compared to
their peers. Extreme caution is advised when choosing indicators and
benchmarks in scholar rankings.
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A comparison of 17 author-level bibliometric indicators for researchers in Astronomy, Environmental Science, Philosophy and Public Health in Web of Science and Google Scholar - Online First - Springer
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