https://sci2s.ugr.es/sites/default/files/files/TematicWebSites/hindex/CostasBordons2007.pdf

The h-index: Advantages, limitations and its relation with other bibliometric indicators at the micro level

Impact factor is a quasi-qualitative indicator, which provides a measurement of the prestige and international visibility of journals. Although the use of impact factor-based indicators for science policy purposes has increased over the last two decades, several limitations have been pointed out and should be borne in mind. The use of impact factor should be treated carefully when applied to the analysis of peripheral countries, whose national journals are hardly covered by ISI databases. Our experience in the use of impact factor based indicators for the analysis of the Spanish scientific production is shown. The usefulness of the impact factor measures in macro, meso and micro analyses is displayed. In addition, the main advantages, such as the great accessibility of impact factor and its ready-to-use nature are pointed out. Several limitations such as the need to avoid inter-field comparisons or the convenience of using a fixed journal set for international comparisons are also stressed. It is worth noting that the use of impact factor in the research evaluation process has influenced strongly the publication strategy of scientists.

/pdf/advantages-and-limitations-in-the-use-of-impact-factor-jma6b70wax.pdf

Advantages and limitations in the use of impact factor measures for the assessment of research performance

http://eprints.rclis.org/12867/1/Research_policy.pdf

The evolution of research activity in Spain: The impact of the National Commission for the Evaluation of Research Activity (CNEAI)

The ability of g-index and h-index to discriminate between different types of scientists (low producers, big producers, selective scientists and top scientists) is analysed in the area of Natural Resources at the Spanish CSIC (WoS, 1994–2004). Our results show that these indicators clearly differentiate low producers and top scientists, but do not discriminate between selective scientists and big producers. However, g-index is more sensitive than h-index in the assessment of selective scientists, since this type of scientist shows in average a higher g-index/h-index ratio and a better position in g-index rankings than in the h-index ones. Current research suggests that these indexes do not substitute each other but that they are complementary.

/pdf/is-g-index-better-than-h-index-an-exploratory-study-at-the-vmvnv5n463.pdf

Is g-index better than h-index? An exploratory study at the individual level

The authors set forth a general methodology for conducting bibliometric analyses at the micro level. It combines several indicators grouped into three factors or dimensions, which characterize different aspects of scientific performance. Different profiles or “classes” of scientists are described according to their research performance in each dimension. A series of results based on the findings from the application of this methodology to the study of Spanish National Research Council scientists in Spain in three thematic areas are presented. Special emphasis is made on the identification and description of top scientists from structural and bibliometric perspectives. The effects of age on the productivity and impact of the different classes of scientists are analyzed. The classificatory approach proposed herein may prove a useful tool in support of research assessment at the individual level and for exploring potential determinants of research success. © 2010 Wiley Periodicals, Inc.

/pdf/a-bibliometric-classificatory-approach-for-the-study-and-lz0x4kqfaw.pdf

A bibliometric classificatory approach for the study and assessment of research performance at the individual level: The effects of age on productivity and impact

The present study is a bibliometric analysis, of publications of Spanish pharmacologists, referenced in the journals of the Pharmacology & Pharmacy subfield of the Science Citation Index- CD Edition from 1984 to 1989. During this time the scientific output of Spanish pharmacologists has been growing at an impressive rate being almost doubled. This rate being notably greater than that corresponding to publications of Spain in all science fields. This increase in scientific output was accompanied by a time-dependent decrease on year by year step basis in the expected impact factor (EIF) of publications (Articles plus Notes), from 1.71 in 1984 to 1.28 in 1989, in close correlation with an increase of mean number of authors per paper, from 3.67 to 4.16 authors/paper, respectively. Moreover, the larger the number of authors/paper, the smaller the EIF. Only 8 journals cumulated more than 50% of the papers. The scientific production was geographically localized at a high extent (Barcelona, Madrid, Valencia accounted for the 63.7% of all the papers) in governmental institutions (University, 75.2%, Hospitals, 14.1%; CSIC, 10.5%) with one large geographical area lacking any productivity.

Bibliometric analysis of publications of Spanish pharmacologists in the SCI (1984-89) - I. Contribution to the "Pharmacology & Pharmacy" subfield (ISI)

F. García-Jover

Papers

Bibliometric analysis of publications of Spanish pharmacologists in the SCI (1984-89) - I. Contribution to the "Pharmacology & Pharmacy" subfield (ISI)