User profiles for Thed van Leeuwen

Thed van Leeuwen

Leiden University
Verified email at cwts.nl
Cited by 11380

The psychology of morality: A review and analysis of empirical studies published from 1940 through 2017

…, Y Paunov, T Van Leeuwen - Personality and …, 2019 - journals.sagepub.com
We review empirical research on (social) psychology of morality to identify which issues and
relations are well documented by existing data and which areas of inquiry are in need of …

Language biases in the coverage of the Science Citation Index and its consequencesfor international comparisons of national research performance

TN Van Leeuwen, HF Moed, RJW Tijssen, MS Visser… - scientometrics, 2001 - Springer
Empirical evidence presented in this paper shows that the utmost care must be taken
ininterpreting bibliometric data in a comparative evaluation of national research systems. From …

[HTML][HTML] Community consensus on core open science practices to monitor in biomedicine

…, JP Alperin, R Costas, ES Sena, T van Leeuwen… - Plos …, 2023 - journals.plos.org
The state of open science needs to be monitored to track changes over time and identify areas
to create interventions to drive improvements. In order to monitor open science practices, …

The Leiden Ranking 2011/2012: Data collection, indicators, and interpretation

…, NJ van Eck, TN van Leeuwen… - Journal of the …, 2012 - Wiley Online Library
The Leiden Ranking 2011/2012 is a ranking of universities based on bibliometric indicators
of publication output, citation impact, and scientific collaboration. The ranking includes 500 …

Towards a new crown indicator: Some theoretical considerations

L Waltman, NJ van Eck, TN van Leeuwen… - Journal of …, 2011 - Elsevier
The crown indicator is a well-known bibliometric indicator of research performance developed
by our institute. The indicator aims to normalize citation counts for differences among fields…

The application of bibliometric analyses in the evaluation of social science research. Who benefits from it, and why it is still feasible

T Van Leeuwen - Scientometrics, 2006 - Springer
The paper discusses an application of bibliometric techniques in the social sciences. While
the interest of policy makers is growing, the topic is getting more and more attention from …

Benchmarking international scientific excellence: Are highly cited research papers an appropriate frame of reference?

R Tijssen, M Visser, T van Leeuwen - Scientometrics, 2002 - akjournals.com
This paper introduces a citation-based "systems approach" for analyzing the various institutional
and cognitive dimensions of scientific excellence within national research systems. The …

The Holy Grail of science policy: Exploring and combining bibliometric tools in search of scientific excellence

T Van Leeuwen, M Visser, H Moed, T Nederhof… - Scientometrics, 2003 - akjournals.com
Abstract Evaluation studies of scientific performance conducted during the past years more
and more focus on the identification of research of the 'highest quality', 'top' research, or '…

[HTML][HTML] Towards a new crown indicator: An empirical analysis

L Waltman, NJ van Eck, TN van Leeuwen… - Scientometrics, 2011 - akjournals.com
We present an empirical comparison between two normalization mechanisms for citation-based
indicators of research performance. These mechanisms aim to normalize citation counts …

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

R Costas, TN Van Leeuwen… - … the American society for …, 2010 - Wiley Online Library
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 …