Accepted for/Published in: JMIR Human Factors
Date Submitted: Jul 13, 2024
Date Accepted: Dec 8, 2024
The translation and adaption of the System Usability Scale into Swedish: an evaluation of psychometric based on the use of a digital application
ABSTRACT
Background:
The Swedish healthcare system is undergoing a transformation. eHealth technologies are increasingly being used. The System Usability Scale is a widely used tool offering a standardized and reliable measure for assessing the usability of digital health solutions. However, despite the existence of several translations of System Usability Scale into Swedish, none have undergone psychometric validation. This highlights the urgent need for a validated and standardized Swedish version of System Usability Scale to ensure accurate and reliable usability evaluations.
Objective:
The aim of the study was to translate and psychometrically evaluate a Swedish version of the System Usability Scale.
Methods:
The study utilized a two-phase design. The first phase translated the System Usability Scale into Swedish and the second phase tested the scale’s psychometrics. A total of 62 participants generated a total of 82 measurements. Descriptive statistics were used to visualize participants’ characteristics. The psychometric evaluation consisted of data quality, scaling assumptions and acceptability. Construct validity was evaluated by convergent validity and reliability by internal consistency.
Results:
The Swedish translation of the System Usability Scale demonstrated high conformity with the original version. The scale showed high internal consistency with a Cronbach's alpha of 0.852 and corrected item-total correlations ranging from 0.454 to 0.731. The construct validity was supported by a significant positive correlation between the System Usability Scale and the eHealth Literacy Questionnaire domain 5.
Conclusions:
The Swedish translation of the System Usability Scale demonstrated satisfactory psychometrics. It can be recommended for use in a Swedish context. The positive correlation with the eHealth Literacy Questionnaire domain 5 further supports the construct validity of the Swedish scale, affirming its suitability for evaluating digital health solutions. Additional tests of the Swedish System Usability Scale, for example, in the evaluation of more complex eHealth technology, would validate the scale still further. Clinical Trial: NCT04150120
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