standards for science metrics, classifications, and mapping
DESCRIPTION
Standards for Science Metrics, Classifications, and Mapping. Loet Leydesdorff University of Amsterdam, Amsterdam School of Communication Research (ASCoR) http://www.leydesdorff.net. Socio-cognitive horizons. input; steering. Scientific enterprise; scholars; institutions. x. - PowerPoint PPT PresentationTRANSCRIPT
Loet Leydesdorff
University of Amsterdam, Amsterdam School of Communication Research (ASCoR)
http://www.leydesdorff.net
Standards for Science Metrics, Classifications, and Mapping
Scientific enterprise;
scholars; institutions
x
Socio-cognitive horizons
input; steering
Three dynamics:
1. Changes in socio-political regimes (national? European?);
2. Changes in socio-cognitive regimes (at the global level?);
3. Changes in institutional arrangments (locally).
OECD; NSB
The dynamics of journals
Evaluation; citation analysis
Standards for journal maps2009
Figure 4: 8,860 journals similar in their citing patterns above cosine > 0.2; 19 clusters (γ = 1) using the algorithm built into VOSViewer (Van Eck et al., 2010).
Figure 7: Distribution of cities in North-Western Europe above or below expectations in terms of integrated impact on the basis of 15 core journals. The sizes of the nodes are proportional to the logarithm of the number of papers; colors: red indicates below expectation; green above. The Google Map is available at http://www.leydesdorff.net/nano2011/nano2011.htm.
i ii xfxI )(*3
Integrated Impact Indicator
+ fractional counting of citationsfor field normalization
Conclusions
• From descriptive statistics to significance testing;
• Use nonparametric statistics for skewed citation distributions;
• Integrated Impact Indicator (I3); Rao-Stirling Diversity measure for interdisciplinarity;
• Test observed against expected!