Clarifying the concept of validity : From measurement to everyday language





Faculty/Professorship: Foundations in Education  
Author(s): Borgstede, Matthias  ; Buntins, Katja; Eggert, Frank
Publisher Information: Bamberg : Otto-Friedrich-Universität
Year of publication: 2020
Pages: 15
Source/Other editions: Theory & psychology, 27 (2017) 5, S. 703–710.
is version of: 10.1177/0959354317702256
Year of first publication: 2017
Language(s): English
DOI: 10.20378/irb-47242
Licence: Creative Commons - CC BY-NC-ND - Attribution - NonCommercial - NoDerivatives 4.0 International 
URN: urn:nbn:de:bvb:473-irb-472429
Abstract: 
Test validity is widely understood as the degree to which a test measures what it should measure (cf. Cattell, 1946). We argue that this conceptualization does not refer to a psychometric problem but to the correspondence between scientific language and everyday language.
Following Steven’s (1946), test results give an operational definition of attributes, qualifying any test as valid by definition. Following the representational theory of measurement (Krantz, Luce, Suppes & Tversky, 1971), an attribute is defined by an empirical relational structure and a corresponding measurement model. Since measurement depends on the specified empirical structure, if a test measures anything, it must be valid.
However, the question of validity can be asked in a meaningful way, if one interprets test results in the context of everyday language. We conclude that validity can be understood as the degree to which the variable measured by a test corresponds to concepts of everyday language.
GND Keywords: Validität; Test; Wissenschaftssprache; Umgangssprache
Keywords: Concept formation; Everyday language; Measurement theory; Psychometrics; Validity
DDC Classification: 150 Psychology  
RVK Classification: CM 3000   
Peer Reviewed: Ja
International Distribution: Ja
Type: Article
URI: https://fis.uni-bamberg.de/handle/uniba/47242
Release Date: 27. February 2020

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