Accepted for/Published in: Journal of Medical Internet Research
Date Submitted: Oct 19, 2022
Date Accepted: Jul 27, 2023
German version of the mobile Agnew Relationship Measure (mARM-G): Translation and validation study
ABSTRACT
Background:
The mobile Agnew Relationship Measure (mARM) is a self-report questionnaire for the evaluation of digital mental health interventions and their interactions with users. With the global increase in digital mental health intervention research, translated measures are required to conduct research with local populations.
Objective:
The aim of this study was to translate and validate the original English version of mARM into a German version: mARM-G.
Methods:
Two native German speakers who spoke English as their second language conducted forward translation of the original items. This version was then back translated by two native German speakers with fluent knowledge of English. An independent bilingual reviewer then compared these drafts and created a final German version. The mARM-German was validated by 15 experts in the field of mobile app development and 15 non-experts for content validity and face validity, 144 participants were recruited to conduct reliability testing as well as confirmatory factor analysis.
Results:
The content validity index of the mARM-G was 0.90 (expert ratings) and 0.79 (non-experts). The face validity index was 0.89 (experts) and 0.86 (non-experts). Internal consistency for the entire scale Cronbach's α = 0.91. Confirmatory factor analysis results were: The chi-square statistic to degrees of freedom ratio was 1.66. Comparative Fit Index was 0.87 and the Tucker-Lewis Index was 0.86. The root mean square error of approximation was 0.07.
Conclusions:
The mARM-G is a valid and reliable tool that can be utilized for future studies in German speaking countries.
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