Volume 87, Issue 3 pp. 715-730
ORIGINAL ARTICLE

Nomological consistency: A comprehensive test of the equivalence of different trait indicators for the same constructs

Isabel Thielmann, 

Corresponding Author

Isabel Thielmann

Department of Psychology, Cognitive Psychology Lab, University of Koblenz-Landau, Landau, Germany

Correspondence

Isabel Thielmann, Department of Psychology, University of Koblenz-Landau, Fortstraße 7, 76829 Landau, Germany.

Email: [email protected]

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Benjamin E. Hilbig, 

Benjamin E. Hilbig

Department of Psychology, Cognitive Psychology Lab, University of Koblenz-Landau, Landau, Germany

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First published: 15 September 2018

Funding information:

Second author supported by research-training group Statistical Modeling in Psychology, funded by German Research Foundation (GRK 2277).

Abstract

Objective

Across all subfields of psychology, it is common practice to use different indicators of allegedly the same personality constructs, resting upon the (often implicit) assumption that the indicators measure equivalent constructs. However, there is a lack of approaches allowing for a strict and comprehensive test of the equivalence assumption. We propose investigating nomological consistency to test the equivalence assumption across inventories allegedly measuring the same set of constructs. Nomological consistency refers to the degree to which different indicators of constructs in a theoretical or structural model (such as the Big Five) show similar (non-)associations with a set of external criteria, thus testing the consistency of the nomological net spanned by different indicators.

Method

In a large-scale study based on a convenience sample (N = 2,846; 64.9% female), we provide an empirical demonstration of nomological consistency across three commonly used Big Five inventories by comparing the pattern of associations of the Big Five constructs across inventories with five external criteria using a multifaceted analytic approach.

Results

Although results showed some level of consistency across the Big Five inventories under scrutiny, there was also a relevant extent of nomological inconsistency.

Conclusions

Testing nomological consistency allows for a more conclusive judgment on the equivalence of different indicators across inventories.

CONFLICT OF INTERESTS

The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Volume87, Issue3

June 2019

Pages 715-730

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.