Showing 9 results for Usability
Javad Faradmal, Javad Keshvari Kamran,
Volume 2, Issue 3 (12-2014)
Abstract
Introduction: Index of usability
evaluates performance, user satisfaction and increased productivity in a
product. Principles of usability are effectiveness, efficiency, safety, utility,
learnability, Memorability. This Study Aims to Develop a Tool to Estimate and
Evaluate the Usability of Web Applications in the field of Automation Research
has been determined.
Material and Methods: After extracting,
an initial questionnaire to assess the usability of the standard resource for
indices of validity, internal consistency and reproducibility, respectively
technique for determining the content validity, test-retest method and
cronbach's alpha coefficient were used. The most important steps were as follow:
(1) determine the scope and dimensions of the questions (2) preparing draft questionnaire (3) appoint the members of the expert panel (4) methods, how
data analysis (5) determine the acceptance criteria
of the questions (6) determine the content validity index (7) determine reliability
of the questionnaire (8) determine reproducibility of the questionnaire.
Results: A 50-Item
questionnaire was designed as the ultimate tool. The content validity index
value of 0.763 was obtained ultimately for the questionnaire. Analysis of the
questionnaire responses revealed that the lower backend errors related to the
reliability coefficient alpha value was equal to 0.742. Finally, the degree of
reproducibility of the questionnaire, using test-retest method, was equal to
value of 0.993 (p <0.001).
Conclusion: After the
final questionnaire design, with good reliability and validity, it is
noticeable that the designed tool is applicable on relevant softwares and may
improve the quality and efficiency of the software and user interface.
Majid Motamedzade, Zahra Moradpour, Hamed Gorjizade, Ghasem Hesam, Abbas Moghim Beigi,
Volume 2, Issue 4 (3-2015)
Abstract
Introduction: The analysis posture methods are counted as a source of investigating the risk of musculoskeletal disorders related to work. Personal digital assistant is a small mobile system with an operative system that can install on various programs such as posture analysis methods.
Method: Firstly, three ways for posture analysis such as QEC, RULA and REBA determined. Afterward, the program of posture analysis methods written by BASCOM software with Basic language in IC MICRO CONTROLLER belong to AVR family, and interned in IC by programmer for making PDA. PDA Usability evaluated by Persian version of system usability scale questionnaire after specifying the validity and reliability of questionnaire. Finally, postural analysis was compared using a PDA with paper method.
Results: The system usability scale of PDA method is 84.2±6.2 which that got B rank and placed in very well situation. Cronbach's Alpha and Pierson correlation coefficient belongs to System usability Scale are 0.716 and 0.888, sequentially (p˂0.001). The comparison between PDA and paper methods show us that time’s operation for analysis posture in PDA method is less than half of the time in papers method. Also, the probability of calculation errors in PDA is zero, but in paper method has tolerance between 2.33 to 8.66.
Conclusion: Use of personal digital assistant for analysis posture solved the problems related to delay achieving to final results and removed the error probability in final results.
Zeinab Kazemi, Hamidreza Mokhtarinia, Reza Oskuei Zadeh,
Volume 4, Issue 2 (10-2016)
Abstract
Introduction: In the recent decades, owing to the advancement of technology, most jobs and occupations require the use of computers. Lack of information about ergonomic conditions has resulted in various occupational injuries. Break time between work and doing exercise, help in reduction of musculoskeletal symptoms. The present study aimed to use a new ergo-feedback software and to assess its usability in office staff.
Methods: Thirty office staff participated in this study. In the first step, muscle-skeletal symptoms were checked by a body map checklist. Then, the Borg score was determined by the participants, initially and after one work day. The software was then run in their systems and they worked with it for about two weeks. After two weeks, the Borg scale was completed again and efficacy of the software was evaluated by the system usability scale (SUS). Data analysis was performed using descriptive statistics (mean and standard deviation) and Wilcoxon test. Statistical analysis was done by the SPSS software version 19.
Results: The results showed that there was a significant difference between the Borg score pre and post intervention (P > .05). The majority of the users were satisfied with the software with the SUS score showing about 82.25% satisfaction.
Conclusions: According to this study, office workers were satisfied with using this software and it can help reduce musculoskeletal symptoms during a prolonged time period.
Ali Arabian, Seyed Abolfazl Zakerian,
Volume 7, Issue 1 (5-2019)
Abstract
Background and Objectives: The use of new technologies, particularly mobile phones, is drastically growing on a daily basis. The usability of mobile phones can be determined for different age groups in order to reach a balanced development plan with respect to this technology. The present study aimed to investigate and compare the usability of touch-screen and button cell phones among Iranian elderly users, with respect to objective performance and perceived usability.
Methods: In this cross-sectional study, 20 elders (50% female) with an average age of were selected by simple random sampling method to measure the usability of touch-screen and button cell phones. In order to assess the objective performance of how elders work with cell phones, tests were conducted including items like typing speed, number of typing errors, taking photo, creating new contacts, and sending text messages. Perceived usability was obtained using a questionnaire of cell phone usability. Furthermore, muscle pressure and mental work load during cell phone use were evaluated by Borg CR10 and NASA-TLX questionnaires, respectively. Data were analyzed conducting statistical analysis tests of T-test and Mann-Whitney by SPSS24 software.
Results: Results revealed that the average typing speed and typing errors in touch-screen cell phones are larger than that in button cell phones. Moreover, the average of perceived usability in touch-screen cell phones (5.8) is higher than that in button cell phones (4.3). Pearson correlation coefficient showed an inverse relationship (-0.3) between perceived usability and mental work load obtained in both types of the cell phones. Findings showed that the maximum perceived muscle pressure when working with a cell phone is felt in the neck area.
Conclusion: According to the obtained results, touch-screen cellphones are suggested for those elders who type more and button cell phones are recommended for those who use the cell phone menu more frequently, namely taking photo, calling, internet, and so forth.
Mahnaz Ahmadlu, Mostafa Pouyakian, Mohammad Ranjbarian, Soheila Khodakarim,
Volume 7, Issue 2 (9-2019)
Abstract
Background and Objectives: There are various models of socket wrench in the market varying in the length and diameter of handle and weight. Each of these features alone can modify the force applied by the hand and affect how comfortable the user is. The purpose of this study was to investigate the relationship between dimensional properties and weight of several models of socket wrench with their usability index score.
Methods: 58 male technicians from maintenance units of Shahid Beheshti University of Medical Sciences performed the task of opening 12 bolts with 8 N/m of torque using 6 models of socket wrench with different physical properties. The sample size was selected based on proposed figures for usability studies. The System Usability Index (SUS) validated questionnaire was used to determine the usability score of each model after the experiment. The study was conducted in 2017. SPSS 21 was used for data analysis.
Results: The results showed that there was a significant relationship between usability index score and dimensional properties and weight of wrenches (P<0.001). Wrench models with longer handle and diameter size close to optimum range of diameter of hand tools for male users had a higher usability score, and participants reported a better test experience with these models.
Conclusion: Using the System Usability Index (SUS Questionnaire) to measure the quality of human-centered design of hand tools is a good way to evaluate and select the hand tools that are widely used by technical staff. The results of this study are valid for short-term applications of wrenches. However, for long time activities, epidemiological and physiological evidences such as EMG should also be used.
Siavash Etemadinezhad, Elahe Amouzadeh, Jamshid Yazdani Charati,
Volume 10, Issue 1 (7-2022)
Abstract
Objectives: Today, many hardware and software products, including office automation software, and web-based websites are used by employees, including professors and employees of different departments in offices. Websites are considered one of the main competitive advantages in any organization. This study aims to investigate the usability of the Integrated Research Automation System (SYAT): A Heuristic Evaluation.
Methods: The present study was a descriptive- cross- sectional study with a heuristic evaluation performed on the integrated research system software (SYAT) by 3 evaluators. They then evaluated the intensity of each of the ten options and scored from 0 to 4. After each problem was classified as one of the 10 branches of Nielsen's evaluation by the evaluators, similar problems were eliminated and the average scores and the severity of the deterioration of the problems were calculated.
Results: A total of 92 usability problems were identified in evaluating the usability of the web-based software (system) using the components provided by Nielsen. The majority of the issues were related to the detection instead of reminder with 16 problems (17.32%). The lowest number of problems was related to both compatibilities between the system and the real world, and the clarity of the system status with 6 cases (6.52%).
Conclusion: The usability assessment method is inexpensive and simple and the problems caused by websites and applications can be evaluated as feedback to improve them. The more accurate the needs of SYAT system users are, the more effective the system will be and the more satisfied the users will be.
Morteza Mahdavi, Arezo Sammak Amani, Mohammad Amin Mououdi, Hadi Asghari,
Volume 10, Issue 2 (9-2022)
Abstract
Objectives: Providing safety for human resources in the industry is very important. Safety shoes are one of the most common PPEs that protect the foot against potential hazards. This study aimed to evaluate the discomfort and usability of safety shoes in different industries of Mazandaran province to find gaps in the quality of design and improve the design of safety shoes.
Methods: This was a cross-sectional study and was conducted in 2021.This study included employees of 11 different industrial companies that used seven safety shoe brands. They answered two researcher-made questionnaires, LPD (discomfort and general satisfaction) and SFUQ (usability). Data analysis was performed with Spearman rank correlation coefficient while Pearson correlation coefficient, and ANOVA test were also performed.
Results: In total, 226 men with a mean age of 36.33 ± 7.4 years were included in this study. The participants reported the lowest usability for the brand G (3.3 and 3.99), and the least discomfort and the most usability index with the brand A (1.2 and 5.35). Overall, the highest satisfaction was reported for brand A and the lowest satisfaction to brand G.
Conclusion: The findings of this study showed that the main problem in comfort and usability is probably related to shoe molds because the manufacturers of safety shoes import molds from abroad that do not fit the anthropometric characteristics of Iranian users’ feet.
Mohammad Amin Mououdi, Arezoo Sammak Amani, Mohammad Taghipour,
Volume 11, Issue 2 (9-2023)
Abstract
Objectives: Nowadays, workers are less mobile and more sedentary due to the use of modern technologies in the workplace, and the complications resulting from static work and fixed posture have caused numerous disorders, including musculoskeletal disorders. This study was conducted to evaluate the comfort and usability of the ergonomic sit-stand desk converter with the aim of preventing disorders caused by constant sitting in workers.
Methods: 30 employees and faculty members of a university voluntarily participated in this study and provided informed consent. After the necessary explanations, subjects were provided with two researcher-created questionnaires ( Local Perceived Discomfort (LPD) and Sit-Stand Desk Converter Usability Questionnaire (SSDCUQ)), two methods of posture analysis, two methods of Workstation evaluation and general satisfaction along with 20-8-2 software and an ergonomic desk converter. After the test period, the data was analyzed using SPSS version 22 software and statistical tests such as mean, standard deviation, Spearman's rank correlation coefficient and Pearson correlation coefficient.
Results: The overall mean LPD in the different body parts was 0.48 ± 0.87, indicating that the converter functions in the range of no problem to very little discomfort. The average overall satisfaction with the function of the converter was 3.18 ± 1.08 ,which is in the medium to good range. When analysing the different sitting and standing postures, a significant correlation was also found between the different situations of using the converter (P<0.0005), which indicates an improvement in sitting and standing posture while using the converter.
Conclusion: Height-adjustable workstations are a good choice to reduce sitting time and improve posture. Despite the improvement in sitting and standing posture when using the converter, there are limitations, such as ignoring the software warnings for sitting and standing in the mechanical converter studied.
Raha Seidi, Mahnaz Saremi, Azam Malekighahfarokhi, Mahshid Namdari,
Volume 12, Issue 2 (7-2024)
Abstract
Objectives: User engagement with digital technologies refers to the sense of belonging and individual satisfaction. Visual aesthetics, characterized by simplicity and diversity, plays a crucial role in the design of products and online sales strategies. This study investigates the relationship between visual aesthetics and user engagement with in a selected social network.
Methods: This correlational descriptive-analytical study examines the attractiveness of two pages with similar educational content but differing visual aesthetics criteria on one of the social networks. The first page (Researcher-made page) exhibits higher standards of attractiveness compared to the second page (Basic page). Data were collected through online questionnaires and analyzed using SPSS software.
Results: The study involved 116 participants, of whom 91 (78.4%) were female, with an average age of 26.8 ± 2.54 years. The majority of participants held a bachelor's degree (57.8%). The average visual aesthetics scores for the content pages (Researcher-made page) and (Basic page) were 95/92 and 84/9, respectively, indicating that Researcher-made page had greater visual appeal. Furthermore, the user engagement scores for Researcher-made page and Basic page were 107/9 and 100/02, respectively. A significant positive correlation was found between visual appeal and user engagement on both pages (P<0.001), while no significant relationship was observed between gender or education level and these metrics (P>0.05).
Conclusion: This study demonstrates that the visual aesthetics of virtual content pages has a significant impact on user engagement. These findings underscore the importance of adhering to attractiveness criteria in content design, which can be beneficial for content creators, managers, and business owners.
