title: Psychometric properties of the persian language version of the system usability scale.
abstract: BACKGROUND
  The System Usability Scale (SUS) is a widely used self-administered instrument for evaluating the usability of a wide range of products and services. The aims of this descriptive-methodological study were to develop and investigate the psychometric properties of the Iranian version of the SUS.
  
  
  METHODS
  The study was conducted among 202 university students from the Tabriz University of Medical Sciences, Iran. Content validity was evaluated by a panel of 10 experts. Construct validity was assessed by exploratory and confirmatory factor analyses. The internal consistency and test-retest reliability were assessed by Cronbach's alpha and Intraclass Correlation Coefficient (ICC), respectively. Additionally the feasibility of the measure was judged by ceiling and floor effect.
  
  
  RESULTS
  Content validity of the short form of Iranian SUS was established. Factor analyses supported the conceptual uni-dimensionality, and thus confirmed the construct validity of the measure. The internal consistency (α = 0.79) and test retest reliability (ICC = 0.96) were both approved and there was also no ceiling nor floor effect.
  
  
  CONCLUSIONS
  The findings support the use of SUS for both practical and research settings in Iranian population.
authors.affiliation: Department of Ergonomics, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Iman
authors.initials: I
authors.lastname: Dianat
authors.affiliation: Department of Ergonomics, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Zahra
authors.initials: Z
authors.lastname: Ghanbari
authors.affiliation: Road Traffic Injury Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: AsghariJafarabadi
keywords: Ergonomics; Iran; Reliability; System usability scale; Validity
references.citation: Ergonomics. 2009 Dec;52(12):1514-28
references.pmid: 19941184
references.citation: Appl Ergon. 2011 May;42(4):563-74
references.pmid: 21036347
references.citation: Psychotherapy (Chic). 2013 Jun;50(2):235-47
references.pmid: 23398031
references.citation: Qual Life Res. 1995 Aug;4(4):293-307
references.pmid: 7550178