Swedish Version of the System Usability Scale: Translation, Adaption, and Psychometric Evaluation

Area of Science:

• Health Informatics
• Human-Computer Interaction
• Psychometrics

Background:

• Sweden's healthcare system is adopting eHealth technologies.
• The System Usability Scale (SUS) is crucial for evaluating digital health tool usability.
• Existing Swedish SUS translations lack psychometric validation, necessitating a standardized version.

Purpose of the Study:

• To translate the System Usability Scale into Swedish.
• To psychometrically evaluate the translated Swedish version of the System Usability Scale.

Main Methods:

• A two-phase study involving translation and psychometric testing.
• Data collected from 62 participants (82 measurements).
• Evaluation of data quality, scaling assumptions, acceptability, construct validity (convergent validity), and reliability (internal consistency).

Main Results:

• The Swedish SUS showed high conformity with the original English version.
• High internal consistency was observed (Cronbach's α = .852).
• Construct validity was supported by a significant positive correlation with the eHealth Literacy Questionnaire (P=.001).

Conclusions:

• The Swedish version of the System Usability Scale possesses satisfactory psychometric properties.
• The scale is recommended for use in evaluating digital health solutions within the Swedish context.
• Further validation with complex eHealth technologies is suggested.