An English-language adaptation of the Interpersonal Trust Short Scale (KUSIV3)
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(2020) 2:10
INTERNATIONAL ADAPTATION OF MEASUREMENT INSTRUMENTS
Open Access
An English-language adaptation of the Interpersonal Trust Short Scale (KUSIV3) Désirée Nießen1* , Constanze Beierlein2, Beatrice Rammstedt1 and Clemens M. Lechner1
Abstract The Interpersonal Trust Short Scale—the English-language adaptation of the Kurzskala Interpersonelles Vertrauen (KUSIV3)—measures interpersonal trust as a psychological disposition with just three items (completion time ~ 30 s). The items of the German-language source version were translated into English using the TRAPD approach. Our empirical validation based on a heterogeneous quota sample in the UK shows that all the reliability coefficients of the English-language adaptation and its correlations with external variables are satisfactory and comparable to those of the German-language source version. Moreover, the results of measurement invariance testing suggest that metric measurement invariance of the scale holds when comparing the UK and Germany, implying the comparability of correlations based on the latent factors across the two nations. As an ultra-short scale, KUSIV3 lends itself to the assessment of interpersonal trust particularly in survey contexts in which assessment time or questionnaire space are limited. It is applicable in a variety of research disciplines, including psychology, sociology, and economics. Keywords: Trust, Interpersonal trust, Attitude, Social interactions, Short scale, Validation
Introduction Interpersonal trust is highly relevant in people’s everyday lives and in contemporary society as a whole. Thus, studies investigating the functioning of social interactions between single individuals need a valid and—especially in research settings with severe time limitations— efficient measure of interpersonal trust. Motivated by this need, Beierlein, Kemper, Kovaleva, and Rammstedt (2014a) developed an ultra-short—three-item—Germanlanguage measure of interpersonal trust, the Interpersonal Trust Short Scale (German: Kurzskala Interpersonelles Vertrauen; KUSIV3). Because no comparable ultra-short scale for the measurement of interpersonal trust exists for the English-language context, we adapted KUSIV3 to English and thoroughly investigated its psychometric properties of the English-language version using a sample from the United Kingdom (UK). * Correspondence: [email protected] 1 GESIS – Leibniz Institute for the Social Sciences, P.O. Box 12 21 55, 68072 Mannheim, Germany Full list of author information is available at the end of the article
Theoretical background Interpersonal trust: definition and conceptualization
Kasperson, Golding, and Tuler (1992) defined trust “as a person’s expectation that other persons and institutions in a social relationship can be relied upon to act in ways that are competent, predictable, and caring” (p. 169). To trust means to expect positive outcomes even in the absence of hard evidence suggesting that positive outcomes will occur. Trust is commonly viewed as a vital social lubricant for economic trans
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