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Qualitative and Quantitative Validation of Tools with Rating Scales Aimed at Assessing the Quality of University Service-Learning

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Testing differences statistically with the Leiden ranking.

Loet Leydesdorff, Lutz Bornmann

|August 21, 2012

Summary

This summary is machine-generated.

The Leiden ranking introduces a new indicator, Proportion of Top-10% Publications, to statistically assess university performance differences. This method enhances the reliability of university comparisons.

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Area of Science:

Bibliometrics
Higher Education Research
Scientific Impact Assessment

Background:

The Leiden ranking is a widely recognized system for evaluating university performance.
Traditional metrics may not fully capture the impact or excellence of research output.
A need exists for more robust indicators to compare academic institutions.

Purpose of the Study:

To introduce and validate the Proportion of Top-10% Publications (PP(top-10%)) as a novel indicator in the Leiden ranking.
To enable statistically significant comparisons of research performance between universities.
To enhance the precision of university impact assessments.

Main Methods:

Utilizing publication data from the Leiden ranking 2011/2012.
Calculating the Proportion of Top-10% Publications (PP(top-10%)) for various institutions.
Applying statistical methods to test performance differences indicated by PP(top-10%).

Main Results:

The PP(top-10%) indicator was successfully implemented in the 2011/2012 Leiden ranking.
This indicator provides a statistically sound basis for comparing the research performance of universities.
The new metric allows for more reliable identification of leading institutions in terms of high-impact publications.

Conclusions:

The Proportion of Top-10% Publications is a valuable addition to university ranking methodologies.
This indicator offers a statistically robust measure for assessing research excellence and impact.
The Leiden ranking's use of PP(top-10%) improves the accuracy of international university comparisons.