Related Experiment Video
Updated: Feb 7, 2026

Qualitative and Quantitative Validation of Tools with Rating Scales Aimed at Assessing the Quality of University Service-Learning
Published on: August 29, 2025
Development and validation of the Monopoly on Truth Scale. A measure of political extremism
Marcos Dono1, Mónica Alzate, Gloria Seoane
1Universidad de Santiago de Compostela.
Background:
Extreme political attitudes have been on the rise since the economic and political crisis of 2008. This surge of extremism constitutes a real threat, as attitudes like these are dangerous for the peaceful, democratic functioning of society. A new cognitive style, Monopoly on Truth has been proposed, based mainly on the concept of naïve realism.
Method:
The development and validation of a scale for this new construct is the main objective of this study. A pilot study (N=209) was performed in order to gather the items that make up the final scale; and a main study (N=369) was conducted to test the validity and predictive power of the scale.
Results:
The validation is successful as the scale shows good reliability scores, while also proving to be linked to extremism-related constructs. Additionally, the scale shows signs of not being ideologically biased.
Conclusion:
Results show the scale to be a very useful tool for studying extremism and other political trends. Future directions and other implications of the Monopoly on Truth are also discussed.
Related Concept Videos
Reliability and Validity
pH Scale
In Vitro Drug Release Testing: Overview, Development and Validation
Absolute and Local Extreme Values
Data Validation
Key parameters for method validation include:
Data Validation
Nursing assessment guides are generally based on holistic models rather than medical...

