Cited by 275Usability and User Interface DesignPsychometric Methodologies and TestingTechnology Adoption and User Behaviour

On the dimensionality of the System Usability Scale: a test of alternative measurement models

Borsci, Simone, Federici, Stefano, Lauriola, Marco·2009·Cognitive Processing

Abstract

The System Usability Scale (SUS), developed by Brooke (Usability evaluation in industry, Taylor & Francis, London, pp 189-194, 1996), had a great success among usability practitioners since it is a quick and easy to use measure for collecting users' usability evaluation of a system. Recently, Lewis and Sauro (Proceedings of the human computer interaction international conference (HCII 2009), San Diego CA, USA, 2009) have proposed a two-factor structure-Usability (8 items) and Learnability (2 items)-suggesting that practitioners might take advantage of these new factors to extract additional information from SUS data. In order to verify the dimensionality in the SUS' two-component structure, we estimated the parameters and tested with a structural equation model the SUS structure on a sample of 196 university users. Our data indicated that both the unidimensional model and the two-factor model with uncorrelated factors proposed by Lewis and Sauro (Proceedings of the human computer interaction international conference (HCII 2009), San Diego CA, USA, 2009) had a not satisfactory fit to the data. We thus released the hypothesis that Usability and Learnability are independent components of SUS ratings and tested a less restrictive model with correlated factors. This model not only yielded a good fit to the data, but it was also significantly more appropriate to represent the structure of SUS ratings.

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Crossref · 10.1007/s10339-009-0268-9

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Authors
Borsci, S., Federici, S., & Lauriola, M.
Affiliations
  • Sapienza University of Rome (IT)
  • University of Perugia (IT)
Corresponding author
Borsci, Simone
Venue
Cognitive Processing
Published
2009-06-30
Volume
10
Issue
3
Pages
193-197
ISSN
  • 1612-4782 (ISSN-L)
  • 1612-4790
OpenAlex
W2058625228
Cited by
275
References
15
Citations by year
2026: 22 · 2025: 17 · 2024: 23 · 2023: 23 · 2022: 24 · 2021: 25 · 2020: 21 · 2019: 23 · 2018: 22 · 2017: 11 · 2016: 17 · 2015: 19 · 2014: 7 · 2013: 12 · 2012: 5
FWCI
4.79
Type
journal article
Language
en
Open access
closed
Locations
  • Cognitive Processing (publishedVersion)
  • PubMed (publishedVersion)
  • IRIS Research product catalog (Sapienza University of Rome) (submittedVersion)
  • University of Twente Research Information (submittedVersion)
Topics
  • Physical Sciences › Computer Science › Human-Computer Interaction › Usability and User Interface Design
  • Social Sciences › Decision Sciences › Management Science and Operations Research › Psychometric Methodologies and Testing
  • Social Sciences › Decision Sciences › Information Systems and Management › Technology Adoption and User Behaviour
Keywords
System Usability Scale, usability evaluation, dimensionality, two-factor model, learnability, usability, correlated factors, measurement model, structural equation modeling, user ratings
MeSH terms
Female, Humans, Learning, Male, Models, Theoretical, Surveys and Questionnaires, User-Computer Interface, Young Adult

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