Article

Assessing the impact of biomedical research in academic institutions of disparate sizes

BMC Medical Research Methodology (Impact Factor: 2.27). 05/2009; 9(1):33. DOI: 10.1186/1471-2288-9-33
Source: PubMed

ABSTRACT

The evaluation of academic research performance is nowadays a priority issue. Bibliometric indicators such as the number of publications, total citation counts and h-index are an indispensable tool in this task but their inherent association with the size of the research output may result in rewarding high production when evaluating institutions of disparate sizes. The aim of this study is to propose an indicator that may facilitate the comparison of institutions of disparate sizes.
The Modified Impact Index (MII) was defined as the ratio of the observed h-index (h) of an institution over the h-index anticipated for that institution on average, given the number of publications (N) it produces i.e. MII = h/10alphaNbeta (alpha and beta denote the intercept and the slope, respectively, of the line describing the dependence of the h-index on the number of publications in log10 scale). MII values higher than 1 indicate that an institution performs better than the average, in terms of its h-index. Data on scientific papers published during 2002-2006 and within 36 medical fields for 219 Academic Medical Institutions from 16 European countries were used to estimate alpha and beta and to calculate the MII of their total and field-specific production.
From our biomedical research data, the slope beta governing the dependence of h-index on the number of publications in biomedical research was found to be similar to that estimated in other disciplines ( approximately 0.4). The MII was positively associated with the average number of citations/publication (r = 0.653, p < 0.001), the h-index (r = 0.213, p = 0.002), the number of publications with > or = 100 citations (r = 0.211, p = 0.004) but not with the number of publications (r = -0.020, p = 0.765). It was the most highly associated indicator with the share of country-specific government budget appropriations or outlays for research and development as % of GDP in 2004 (r = 0.229) followed by the average number of citations/publication (r = 0.153) whereas the corresponding correlation coefficient for the h-index was close to 0 (r = 0.029). MII was calculated for first 10 top-ranked European universities in life sciences and biomedicine, as provided by Times Higher Education ranking system, and their total and field-specific performance was compared.
The MII should complement the use of h-index when comparing the research output of institutions of disparate sizes. It has a conceptual interpretation and, with the data provided here, can be computed for the total research output as well as for field-specific publication sets of institutions in biomedicine.

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    • "The evaluation of academic research performance is nowadays a priority issue. Bibliometric indices are an indispensable tool in evaluating the research output of individuals and institutions (Sypsa and Hatzakis, 2009). Bibliometric is the scientific and quantitative study of publications and is used to identify the pattern of publication, authorship, and secondary journal coverage to gain insight into the dynamics of growth of knowledge in the areas under consideration. "
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    ABSTRACT: Purpose The study aims at examining the research productivity of Government Medical College Jammu and provides a Bibliometric profile of biomedical publications of Government Medical Jammu. Methodology Necessary Bibliometric indicators have been employed to assess the trends and volume of research published. Documents published by researchers and practitioners of Government Medical College Jammu for the period 1973 to May, 2011 and indexed in Scopus Database have been analysed. Results The results of the present study reveals that the Government medical college Jammu is accelerating in terms of output. A total of 514 publications were contributed by the college during the study period. Highly productive departments are General medicine, pharmacology, surgery and pathology with 97 (18.87%), 69 (13.42%), 46 (8.95%) and 39 (7.59%) publications respectively. The majority of publications were contributed by multi authors (470, 91.44%). The most highly cited departments are paediatrics, endocrinology and Dermatology with average citations 4.28%, 3.5% and 3.38% respectively. In terms of collaboration the share of national collaboration was highest followed by regional and international collaboration. Intra disciplinary collaboration was found maximum (254, 54.04%) in the institution. Originality / value This study is the first of its kind, revealing research trends and serves as an indicator of the productivity of the college’s practitioners and researchers. Bibliometric analysis of this type can provide helpful information about changes in the patterns of scholarly communication. Limitations The study had some limitations. The focus of the present study is on publications indexed by Scopus, which are indeed a small portion of the several studies conducted by the researchers in Government Medical College Jammu. Therefore, study does not fully reflect the entire productivity of the total number of researchers in the fields under study.
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    • "Calculating the h-index by country can be considered an analog method, since it involves only the most cited publications. This index was designed by Hirsch to evaluate the publications of a single investigator (Hirsch 2005) but its use soon spread to wider areas and many variants were developed, applying to universities and countries (Ponce and Lozano 2010; Schubert 2007; Csajbók et al. 2007; Sypsa 2009; Spiroski 2010). Our study shows that those countries with large numbers of published papers and citations included in the 75 percentile are the countries with higher h-index. "
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