In systems engineering, the system usability scale sus is a simple, tenitem attitude likert scale giving a global view of subjective assessments of usability. The sus is a 10item attitude likert scale that measures subjective usability of a system by yielding a single score on a scale of 0100 and allows for a comparison across different systems using normative data. Qualitative feedback, postuse system usability scale sus scores, and realworld usage data collected. The system usability scale sus is a wellresearched and widely used. For each of the following statements, mark one box that best describes your reactions to the website today. We talked about his motivation and process for creating the now famous quick and dirty questionnaire. Participants were also asked to rate gowns on attributes of ease of use during donning, clinical care, doffing, convenience, design. The system usability scale sus is an inexpensive, yet effective tool.
Exploring user satisfaction for elearning systems via. The projects were generally one of three categories. Evaluation, international journal of humancomputer interaction, 246. Usability can be described as the capacity of a system to provide a condition for its users to perform the tasks safely, effectively, and efficiently while enjoying the experience. Things arent this simple at all though, but lets start by considering the following propositions about usability evaluation. In an empirical evaluation of the system usability scale2 the author claims that for internetbased web pages 50 users are needed to get a good result. Abstractthe aim of the study is to delineate quantitative usability evaluation of 50academic websites using system usability scale. Empirical evaluation of the system usability scale semantic scholar. Sus the system usability scale in response to these requirements, a simple usability scale was developed. The majority of the research hypotheses were confirmed. Sus system usability scale, a summary malin fabbri.
Usability evaluation any analysis or empirical study of the usability of a prototype or system goal is to provide feedback in software development in support of an iterative development process recognize problems, understand underlying causes, and plan changes goals of usability evaluation design construction formative evaluation. The sus is a 10 item questionnaire with 5 response options. It provides a reference score for participants subjective view of a products or services usability. Factor analysis of two independent sus data sets reveals that the sus actually has two factors usable 8 items and learnable 2 items specifically, items 4 and 10. While a 100point scale is intuitive in many respects and allows for relative judgments, information. The translation is based on a crowdsourcing project initiated by wolfgang reinhardt during his time at the university of paderborn. Usability has been a popular theme that is extensively studied in the field of humancomputer interaction hci field shneiderman, 1998. The system usability scale sus is a tenitem rating scale for measuring perceived usability. Make prototypes of the system early and quickly actually faster to prototype first 8. Objective mobile health mhealth systems are becoming more common for chronic disease management, but usability studies are still needed on patients perspectives and mhealth interaction performance. This association strengthens the validity of the sus. Perceived usability evaluation of learning management. Accessibility 25 contentstrategy 71 informationarchitecture 6 interactiondesign 162. Since its introduction in 1986, the 10item system usability scale sus has been assumed to be unidimensional.
Put simply, usability evaluation assesses the extent to which an interactive system is easy and pleasant to use. Aldwyn 2011 argues that usability is a requirement to survive in internet environment. The system usability scale sus is the most used questionnaire to measure perceptions of usability it was developed 30 years ago by john brooke. In order to quantify the satisfaction of the university participants for using the elearning platform, the system usability scale sus brooke, 1996 is considered at the end of the experiment session. The system usability scale, or sus, was created in 1986 by john brooke as a quick and dirty way to measure the usability of products usability. This article presents nearly 10 years worth of system usability scale sus data collected on numerous. Their article is based on almost 10 years worth of sus data more than 200 sus studies.
The sus contains a mix of positive and negative items pertaining to different usability aspects of web applications, including effectiveness i. It provides an easytounderstand score from 0 negative to 100 positive. Literature was considered for inclusion if it was 1 focused on an ehealth application which includes websites, pc software, smartphone and tablet applications, 2 provided information about usability of the application, 3 provided empirical results of the. This work is licensed under a creative commons attribution 4. An empirical approach for evaluating the usability of. In measuring usability with the system usability scale sus 4 the author states that the user group and the reliability of the test is unrelated and a sus assessment can be done with as. However, surprisingly few studies have used sus to evaluate the perceived usability of learning management. Perceived usability affects greatly students learning effectiveness and overall learning experience, and thus is an important requirement of educational software. Evaluation of a redesigned personal protective equipment. This deficiency is addressed by our quantitative usability study of a mhealth diabetes system evaluating patients task performance, satisfaction, and the relationship of these. For german users, a group of sap usability professionals made a translation available in 20 which we proudly repost in this community.
Perceived usability evaluation of learning management systems. An overview of the system usability scale in library. The study utilizes one of different applications of sus on academic websites in which, the users are not implored. In software engineering, usability is the degree to which a software can be used by specified consumers to achieve quantified objectives with effectiveness, efficiency, and satisfaction in a quantified context of use. The system usability scale sus is an inexpensive, yet effective tool for assessing the usability of a product, including web sites, cell phones, interactive voice response systems, tv applications, and more. Rather than one established meaning of usability, there are, however, multiple images of usability. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior. Usability evaluation of an ehealth intervention for family. Usability evaluation the encyclopedia of humancomputer.
Analysis of the results also demonstrated the validity and reliability of sus for lmss evaluation, and that it remains robust even for small sample sizes. The system usability scale sus is an inexpensive, yet. A retrospectivejus the journal of usability studies. Overview of attention for article published in international journal of humancomputer interaction, july 2008. Field experiments are considered indispensable if the goal is to study a wider range of factors affecting the overall acceptance of the mobile service. Rather more than 25 years ago, as part of a usability engineering program, i developed a questionnairethe system usability scale susthat could be used to take a quick measurement of how people perceived.
The system usability scale sus is a wellresearched and widely used questionnaire for perceived usability evaluation. The system usability scale sus is a simple, widely used 10statement survey developed by john brooke while at digital equipment corporation in the 1980s as a. The dashboard prototype was deemed to have high usability mean system usability scale, 73. Empirical evaluation of the system usability scale by aaron bangor.
I had the fortune to meet with john in person last month in london. Heuristic evaluation is a usability inspection technique first developed by. Extension of technology acceptance model by using system. The effect of experience on system usability scale ratings. Methods of usability testing in the development of ehealth. Both of these methods have their own strengths and limitations, depending on the objectives and the context of the usability evaluation. Sus includes 10 questions that are analyzed as a whole. It has been used extensively by various industries to test numerous systems and applications, including hardware, software, mobile devices, websites and applications usability. The sus, developed by brooke 1996, reflected a strong need in the usability community for a tool that could quickly and easily collect a users subjective rating of a products usability. The sus is one of the most popular methods in the literature which is devised mainly to evaluate the usability.
Empirical evaluation of the system usability scale. Scale sus as a quick and dirty method of evaluating the usability of different. In an analysis of the system usability scale, bangor, kortum, and miller note the survey provides a single score on a scale that is easily understood by a wide range of people from project managers to computer programmers 2008, p. I think that i would like to use this website frequently. An empirical evaluation of the system usability scale taylor. It was developed by john brooke at digital equipment corporation in the uk in 1986 as a tool to be used in usability engineering of electronic office systems. Measuring usability with the system usability scale sus. International journal of humancomputer interaction. Full length article exploring user satisfaction for elearning systems via usagebased metrics and system usability scale analysis nouzha harrati a,b, imed bouchrika b, abdelkamel tari a, ammar ladjailia b a department ofcomputer science, university bejaia, 6000, algeria b faculty oftechnology and science, university souk ahras, 4, algeria a r t i c l e i n f o. Pdf perceived usability evaluation of learning management. Sus is a technology independent ten item scale for subjective evaluation of the usability. An empirical evaluation of the system usability scale. Empirical evaluation of the system usability scale orfanou, tselios, and.
Coordination of the total interface for consistency including documentation, help, etc. Two case studies in the design and evaluation of a mobile. Usability evaluation methods different kinds of system evaluationresearch analyticempirical analytic means reasoning and working by analysis empirical means making observationsor measurements formativesummative formative research earlier. Overview of attention for article published in international journal of human computer interaction, july 2008. The system usability scale sus is a simple, tenitem scale giving a global view of subjective assessments of usability. The system usability scale brooke, 1996 is a widely used, standardized 10item questionnaire to measure user satisfaction. Analytical and empirical methods for usability evaluation.
An empirical evaluation of the system usability scale altmetric. The factor structure of the system usability scale. Usability methods and assessments included observation of nurses interacting with the dashboard, the system usability scale and the questionnaire for user interaction satisfaction short form. This article presents nearly 10 years worth of system usability scale sus data collected on numerous products in all phases of the development lifecycle. The user studies revealed low system usability scale sus scores for those apps that had a high number of usability problems based on the heuristic evaluation. An extended version of technology acceptance model has been proposed and used by employing one of the most reliable measures of perceived eased of use, the system usability scale.
Sus is technology independent and has since been tested on hardware, consumer software, websites, cellphones, ivrs and even the yellow pages. I think that i would need the support of a technical person to be able to use this system. Jus journal template the journal of usability studies. Application assessing product with system usability scale. Twentythree carers were recruited to the study and participated in a thinkaloud test or a remote online trial of the intervention. The term usability is ubiquitous in humancomputer interaction, so much so that it is commonly used without definition. International journal of humancomputer interaction 24, 6. I think that i would like to use this system frequently.