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Nelson Pacheco Da Rocha - One of the best experts on this subject based on the ideXlab platform.
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WorldCIST (2) - European Portuguese Validation of Usefulness, Satisfaction and Ease of Use Questionnaire (USE)
Advances in Intelligent Systems and Computing, 2017Co-Authors: Carina Dantas, Ana Isabel Martins, Alexandra Queiros, Ana Luísa Jegundo, João Quintas, Nelson Pacheco Da RochaAbstract:Background: The Usefulness, Satisfaction and Ease of use (USE) is a 30-item Questionnaire developed to assess self-perceived Usability. Objective: The study reported in this paper supports the translation, cultural adaptation and validation of the European Portuguese version of the USE. Methods: The study was divided into two phases, the Questionnaire translation and adaptation, and the assessment of its validity and reliability. Results: The Questionnaire translation resulted in a European Portuguese version of the USE equivalent to the original version in terms of semantic and content, which presents an excellent internal consistency (α = 0.80), highly satisfactory ICC values (ICC = 0.69) and a high and significant correlation (r = −0.84, p < 0.05) with another widely used Usability Questionnaire, the Post-Study System Usability Questionnaire. Conclusion: The European Portuguese version of the USE has adequate psychometric properties that provide adequate evidence of the possibility of using this version in studies to evaluate the self-perceived Usability of products or services.
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Usability evaluation of ambient assisted living systems using a multi method approach
Proceedings of the 7th International Conference on Software Development and Technologies for Enhancing Accessibility and Fighting Info-exclusion, 2016Co-Authors: Ana Isabel Martins, Alexandra Queiros, Anabela G Silva, Nelson Pacheco Da RochaAbstract:Background -- The assessment of the Usability of Ambient Assisted Living (AAL) products and services is a demanding process due to their complexity. Objective -- To verify the feasibility of using a multi-method approach for data collection when evaluating the Usability of AAL products and services. Methods -- An experimental study was conducted using two Questionnaires, the Post-Study System Usability Questionnaire (PSSUQ) and the International Classification of Functionality, Disability and Health based Usability Scale (ICF-US), together with the registration of quantitative data related to the performance of the users carrying out specific tasks, and the registration of critical incidents. Results -- The experimental results suggest that the PSSUQ (to determine self-perceived Usability) and the ICF-US (to determine the opinion of the evaluator on the users' performance) promote an accurate evaluation of the interaction mechanisms. Conclusion -- Multiple data collection methods seems to be an efficient approach for Usability evaluation of AAL products and services.
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DSAI - European Portuguese Validation of the System Usability Scale (SUS)
Procedia Computer Science, 2015Co-Authors: Ana Isabel Martins, Ana Filipa Rosa, Alexandra Queiros, Anabela G Silva, Nelson Pacheco Da RochaAbstract:Abstract The System Usability Scale (SUS) is a widely used self-administered instrument for the evaluation of Usability of a wide range of products and user interfaces. The principal value of the SUS is that it provides a single reference score for participants’ view of the Usability of a product or service. This paper presents the translation, cultural adaptation and a contribution to the validation of the European Portuguese version of SUS. The conducted work comprised two phases, the scale translation, and the scale validation. The first phase resulted in a European Portuguese version equivalent to the original in terms of semantic and content. The second phase involved the assessment of the validity and reliability of the scale. The instrument has construct validity as it presents a high and significant correlation with other two Usability metrics, the Post-Study System Usability Questionnaire (PSSUQ) (r = 0.70) and a general Usability question (r = 0.48). The reliability results show less than satisfactory ICC values (ICC = 0.36), however the percentage of agreement is satisfactory (76.67%). Further studies are needed to investigate the reliability of the Portuguese version.
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European Portuguese validation of the Post-Study System Usability Questionnaire (PSSUQ)
2015 10th Iberian Conference on Information Systems and Technologies (CISTI), 2015Co-Authors: Ana Filipa Rosa, Ana Isabel Martins, Alexandra Queiros, Victor Costa, Anabela Silva, Nelson Pacheco Da RochaAbstract:The Post-Study System Usability Questionnaire (PSSUQ) is a 19-item instrument developed to assess the user satisfaction with system Usability. The PSSUQ is widely used and robust in psychometric terms. This paper presents the process of translation, cultural adaptation and contribution to validation of the European Portuguese version of PSSUQ. The study is divided in two phases, the Questionnaire translation and adaptation and the Questionnaire validation. The Questionnaire translation resulted in a Portuguese European version of PSSUQ equivalent to the original in terms of semantic and content. The second phase consisted of the validity and reliability assessment. The PSSUQ has excelent internal consistency (α = 0.80), as well as, satisfactory inter-rater reliability (ICC = 0.67). The PSSUQ presents construct validity, with a high and significant correlation with an overall Usability evaluation question (r=0.84, p
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european portuguese validation of the post study system Usability Questionnaire pssuq
Iberian Conference on Information Systems and Technologies, 2015Co-Authors: Ana Filipa Rosa, Ana Isabel Martins, Alexandra Queiros, Anabela G Silva, Victor Costa, Nelson Pacheco Da RochaAbstract:The Post-Study System Usability Questionnaire (PSSUQ) is a 19-item instrument developed to assess the user satisfaction with system Usability. The PSSUQ is widely used and robust in psychometric terms. This paper presents the process of translation, cultural adaptation and contribution to validation of the European Portuguese version of PSSUQ. The study is divided in two phases, the Questionnaire translation and adaptation and the Questionnaire validation. The Questionnaire translation resulted in a Portuguese European version of PSSUQ equivalent to the original in terms of semantic and content. The second phase consisted of the validity and reliability assessment. The PSSUQ has excelent internal consistency (α = 0.80), as well as, satisfactory inter-rater reliability (ICC = 0.67). The PSSUQ presents construct validity, with a high and significant correlation with an overall Usability evaluation question (r=0.84, p<0.05). The PSSUQ presents discriminative validity, distinguishing applications with distinct quality.
Douglas B Maxwell - One of the best experts on this subject based on the ideXlab platform.
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preliminary review of a virtual world Usability Questionnaire
International Conference on Virtual Augmented and Mixed Reality, 2016Co-Authors: Crystal S Maraj, Sushunova G Martinez, Karla Badillourquiola, Jonathan Stevens, Douglas B MaxwellAbstract:Improving performance through training in virtual environments has led to identifying the best methods associated with enhancing human-computer interaction. This paper provides a description of a Usability Questionnaire for Virtual World training, by focusing on experiential U.S. Army Warrior Leader Course tasks performed using an input desktop device (i.e., a mouse and keyboard). The Usability Questionnaire was developed by integrating established Usability subscales. A Likert scale for both user experience (for game genre and controller type) and Usability levels were implemented, along with free response questions, to gain insight into the controller interface(s). Descriptive statistics and determination of internal consistency (using Cronbach’s alpha) are reviewed for establishing the reliability and validity of the novel Questionnaire. Proposed changes to the Questionnaire include removal of superfluous items and consolidation of subscales. Tradeoffs for types of controllers are discussed, in light of the results.
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HCI (10) - Preliminary Review of a Virtual World Usability Questionnaire
Lecture Notes in Computer Science, 2016Co-Authors: Crystal S Maraj, Sushunova G Martinez, Jonathan Stevens, Karla Badillo-urquiola, Douglas B MaxwellAbstract:Improving performance through training in virtual environments has led to identifying the best methods associated with enhancing human-computer interaction. This paper provides a description of a Usability Questionnaire for Virtual World training, by focusing on experiential U.S. Army Warrior Leader Course tasks performed using an input desktop device (i.e., a mouse and keyboard). The Usability Questionnaire was developed by integrating established Usability subscales. A Likert scale for both user experience (for game genre and controller type) and Usability levels were implemented, along with free response questions, to gain insight into the controller interface(s). Descriptive statistics and determination of internal consistency (using Cronbach’s alpha) are reviewed for establishing the reliability and validity of the novel Questionnaire. Proposed changes to the Questionnaire include removal of superfluous items and consolidation of subscales. Tradeoffs for types of controllers are discussed, in light of the results.
Andreas Sonderegger - One of the best experts on this subject based on the ideXlab platform.
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pictorial system Usability scale p sus developing an instrument for measuring perceived Usability
Human Factors in Computing Systems, 2019Co-Authors: Juergen Baumgartner, Naomi Frei, Mascha Kleinke, Juergen Sauer, Andreas SondereggerAbstract:We have developed a pictorial multi-item scale, called P-SUS (Pictorial System Usability Scale), which aims to measure the perceived Usability of mobile devices. The scale is based on the established verbal Usability Questionnaire SUS (System Usability Scale). A user-centred design process was employed to develop and refine its 10 pictorial items. The scale was tested in a first validation study (N=60) using student participants. Psychometric properties (convergent validity, criterion-related validity, sensitivity, and reliability), as well as the motivation to fill in the scale were assessed. The results indicated satisfactory convergent validity for about two-thirds of the items. Furthermore, strong correlations were obtained for the sum scores between verbal and pictorial SUS, and the pictorial scale was perceived as more motivating than the verbal Questionnaire. The P-SUS represents a first attempt to provide a pictorial Usability scale for the evaluation of (mobile) devices.
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CHI - Pictorial System Usability Scale (P-SUS): Developing an Instrument for Measuring Perceived Usability
Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems - CHI '19, 2019Co-Authors: Juergen Baumgartner, Naomi Frei, Mascha Kleinke, Juergen Sauer, Andreas SondereggerAbstract:We have developed a pictorial multi-item scale, called P-SUS (Pictorial System Usability Scale), which aims to measure the perceived Usability of mobile devices. The scale is based on the established verbal Usability Questionnaire SUS (System Usability Scale). A user-centred design process was employed to develop and refine its 10 pictorial items. The scale was tested in a first validation study (N=60) using student participants. Psychometric properties (convergent validity, criterion-related validity, sensitivity, and reliability), as well as the motivation to fill in the scale were assessed. The results indicated satisfactory convergent validity for about two-thirds of the items. Furthermore, strong correlations were obtained for the sum scores between verbal and pictorial SUS, and the pictorial scale was perceived as more motivating than the verbal Questionnaire. The P-SUS represents a first attempt to provide a pictorial Usability scale for the evaluation of (mobile) devices.
Crystal S Maraj - One of the best experts on this subject based on the ideXlab platform.
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preliminary review of a virtual world Usability Questionnaire
International Conference on Virtual Augmented and Mixed Reality, 2016Co-Authors: Crystal S Maraj, Sushunova G Martinez, Karla Badillourquiola, Jonathan Stevens, Douglas B MaxwellAbstract:Improving performance through training in virtual environments has led to identifying the best methods associated with enhancing human-computer interaction. This paper provides a description of a Usability Questionnaire for Virtual World training, by focusing on experiential U.S. Army Warrior Leader Course tasks performed using an input desktop device (i.e., a mouse and keyboard). The Usability Questionnaire was developed by integrating established Usability subscales. A Likert scale for both user experience (for game genre and controller type) and Usability levels were implemented, along with free response questions, to gain insight into the controller interface(s). Descriptive statistics and determination of internal consistency (using Cronbach’s alpha) are reviewed for establishing the reliability and validity of the novel Questionnaire. Proposed changes to the Questionnaire include removal of superfluous items and consolidation of subscales. Tradeoffs for types of controllers are discussed, in light of the results.
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HCI (10) - Preliminary Review of a Virtual World Usability Questionnaire
Lecture Notes in Computer Science, 2016Co-Authors: Crystal S Maraj, Sushunova G Martinez, Jonathan Stevens, Karla Badillo-urquiola, Douglas B MaxwellAbstract:Improving performance through training in virtual environments has led to identifying the best methods associated with enhancing human-computer interaction. This paper provides a description of a Usability Questionnaire for Virtual World training, by focusing on experiential U.S. Army Warrior Leader Course tasks performed using an input desktop device (i.e., a mouse and keyboard). The Usability Questionnaire was developed by integrating established Usability subscales. A Likert scale for both user experience (for game genre and controller type) and Usability levels were implemented, along with free response questions, to gain insight into the controller interface(s). Descriptive statistics and determination of internal consistency (using Cronbach’s alpha) are reviewed for establishing the reliability and validity of the novel Questionnaire. Proposed changes to the Questionnaire include removal of superfluous items and consolidation of subscales. Tradeoffs for types of controllers are discussed, in light of the results.
Young Sam Ryu - One of the best experts on this subject based on the ideXlab platform.
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mobile phone Usability Questionnaire mpuq and automated Usability evaluation
International Conference on Human-Computer Interaction, 2009Co-Authors: Young Sam RyuAbstract:The mobile phone has become one of the most popular products amongst today's consumers. The Mobile Phone Usability Questionnaire (MPUQ) was developed to provide an effective subjective Usability measurement tool, tailored specifically to the mobile phone. Progress is being made in the HCI research community towards automating some aspects of the Usability evaluation process. Given that this effort is gaining traction, a tool for measurement of subjective Usability, such as MPUQ, may serve as a complement to automated evaluation methods by providing user-centered values and emotional aspects of the product. Furthermore, experimental comparison of MPUQ assessments and automated Usability analysis may enable researchers to determine whether automated Usability tools generate metrics that correlate with user impressions of Usability.
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HCI (1) - Mobile Phone Usability Questionnaire (MPUQ) and Automated Usability Evaluation
Human-Computer Interaction. New Trends, 2009Co-Authors: Young Sam RyuAbstract:The mobile phone has become one of the most popular products amongst today's consumers. The Mobile Phone Usability Questionnaire (MPUQ) was developed to provide an effective subjective Usability measurement tool, tailored specifically to the mobile phone. Progress is being made in the HCI research community towards automating some aspects of the Usability evaluation process. Given that this effort is gaining traction, a tool for measurement of subjective Usability, such as MPUQ, may serve as a complement to automated evaluation methods by providing user-centered values and emotional aspects of the product. Furthermore, experimental comparison of MPUQ assessments and automated Usability analysis may enable researchers to determine whether automated Usability tools generate metrics that correlate with user impressions of Usability.
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Decision models for comparative Usability evaluation of mobile phones using the mobile phone Usability Questionnaire (MPUQ)
Journal of Usability Studies archive, 2007Co-Authors: Young Sam Ryu, Tonya L. Smith-jackson, Kari Babski-reeves, Maury A. NussbaumAbstract:A comparative Usability evaluation was performed using various subjective evaluation methods, including Mobile Phone Usability Questionnaire (MPUQ). Further, decision-making models using Analytic Hierarchy Process (AHP) and multiple linear regression were developed and applied. Although the mean rankings of the four phones were not significantly different across the evaluation methods, there were variations across the methods in terms of the number of rank orderings, preference proportions, and methods to select their initial preference. Thus, this study provided a useful insight into how users make different decisions through different evaluation methods. Also, the result showed that answering a Usability Questionnaire affected a user's decision-making process for comparative evaluation.
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Reliability and validity of the mobile phone Usability Questionnaire (MPUQ)
Journal of Usability Studies archive, 2006Co-Authors: Young Sam Ryu, Tonya L. Smith-jacksonAbstract:This study was a follow-up to determine the psychometric quality of the Usability Questionnaire items derived from a previous study (Ryu and Smith-Jackson, 2005), and to find a subset of items that represents a higher measure of reliability and validity. To evaluate the items, the Questionnaire was administered to a representative sample involving approximately 300 participants. The findings revealed a six-factor structure, including (1) Ease of learning and use, (2) Assistance with operation and problem solving, (3) Emotional aspect and multimedia capabilities, (4) Commands and minimal memory load, (5) Efficiency and control, and (6) Typical tasks for mobile phones. The appropriate 72 items constituted the Mobile Phone Usability Questionnaire (MPUQ), which evaluates the Usability of mobile phones for the purpose of making decisions among competing variations in the end-user market, determining alternatives of prototypes during the development process, and evolving versions during an iterative design process.
