Showing 5 results for Validity
Ms Mona Larki, Dr Majid Ghaffari, Dr Fereshteh Baezzat,
Volume 10, Issue 2 (11-2018)
Abstract
Introduction: Until now, attention has not been paid to the stressful effect of perception of effort-reward imbalance in university students. The present study aimed at construction and validation of student version of the Effort-Reward Imbalance Questionnaire (ERIQ-S) in a sample of Iranian university students.
Methods: A sample of three hundred and seventy unpaid girl students, aged between 19 and 35 years old (21.37 ± 1.91 years), were selected through multiple cluster sampling from University of Mazandaran, Iran. All participants were asked to complete the ERIQ-S, the student version of Oldenburg Burn-Out Inventory (OLBI-S), and the Academic Justice Scale (AJS).
Results: Exploratory Factor Analysis (EFA) showed five factors namely effort, esteem, security, promotion, and over-commitment (29 items) for ERIQ-S, which explained 60.79% of the effort-reward imbalance construct. The findings of Confirmatory Factor Analysis (CFA) confirmed the factor structure of the ERIQ-S. The construct validity of ERIQ-S was also confirmed by the correlation coefficients between the sub-scales and the total score of the questionnaire. The convergent and divergent validity of the ERIQ-S were supported by an expected pattern of correlations between the questionnaire and the measures of burn-out and academic justice. All correlation coefficients between the mean scores of the ERIQ-S and the scores of the OLBI-S and the AJS were statistically significant. The obtained internal consistency was markedly high (Cronbach’s α = .70 to .88). The test-retest reliability of the ERIQ-S was .83.
Conclusion: The results suggest that the student version of ERIQ is a reliable and valid measure.
Adel Mazloumi, Armin Paykari, G.h.halvani Halvani, Seed Ghaneh, Musa Mashayekhi,
Volume 10, Issue 3 (12-2018)
Abstract
Abstract
Background: Usability is an index to assess a product from the viewpoint of users satisfaction, efficiency and productivity improvement. The main attributes of usability that are derived from the human factors are and used in usability design of the interfaces Include: compatibility, consistency, flexibility, minimal action, perceptual limitation, usefulness, learnability, ease of use, minimal memory load, user guidance, satisfaction and errors. The main aim of this study was to assess the usability of interface design tool for a ventilator utilized in the hospitals of Arak city, Iran; and study its validation and reliability.
Methods and Materials
After constructing the initial questionnaire from the standard sources, specific techniques to determine the validity, and Cronbach's alpha coefficient were used for the validity and reliability study. The study procedure was: determining the scope and dimensions of the questions, drafting questionnaire, assigning members of the expert panel, study, questionnaire data acquisition and analysis methods, determining acceptance criteria of the questions and the content validity and reliability index.
Results
Final tool was a 42-items questionnaire. The content validity index (CVI) of questionnaire was 0.86. The results showed that the total Cronbach's alpha coefficient was 0.89 as an acceptable value for the reliability of questionnaire.
Conclusion
After the final questionnaire design and the appropriate validity and reliability of it, adopting this tool to assess the usability of breathing apparatus (ventilator) is recommended. With usability assessment of such vital instruments, quality improvement, higher efficiency and productivity as well as errors reduction and good design user interface will be achieved.
Marjan Firoozeh, Amir Kavousi, Sajedeh Hasanzadeh,
Volume 12, Issue 4 (3-2021)
Abstract
Introduction: Modified Euro Quest questionnaire to assess neurological and psychiatric effects caused by exposure to organic solvents is used. This study investigates the validity, reliability, and usability of the modified Euro Quest questionnaire in Iran.
Materials and Methods: This cross-sectional descriptive study was conducted on 206 workers of color and textile industries. Modified Euro Quest questionnaire was translated into Persian by using the forward-backward translation standard method. To evaluate the content validity, convergent validity, internal consistency, and reliability of the questionnaire were used the index CVI, Pearson correlation coefficient, Cronbach's alpha, and test-retest. The convergent validity was compared, results of the questionnaire, with results of mini-mental state examination (MMSE) and Multidimensional Fatigue Inventory (MFI).
Results: The relationship between the modified Euroquest questionnaire was compare with the MMSE test and the MFI's questionnaire, Pearson correlation coefficients, and the results showed in order - 0.86 and 0.65, which represents a significant inverse correlation between this questionnaire with MMSE test(p>0.001) And a moderate correlation with the MFI's questionnaire(p>0.001). Content validity index (CVI) and intraclass correlation coefficient (ICC) were obtained in order amounts of ≤0.79 and 0.92, which was acceptable. The final questionnaire, Cronbach's alpha coefficient, was calculated (α =0.84).
Conclusion: The modified Euroquest Persian version is a valuable tool to assess the neurological and psychological effects caused by exposure to organic solvents in Iranian workers.
Mehdi Asghari, Ehsan Farvesh, Mohammadjavad Ghanadzadeh, Reza Tajik,
Volume 15, Issue 3 (10-2023)
Abstract
Introduction: Laboratories play a crucial role in education and scientific research by providing an environment for various experiments and investigations. However, due to potential hazards such as chemical, biological, and physical agents, laboratories are inherently considered dangerous work environments. Therefore, it is essential to have a reliable and valid tool to evaluate the safety of these environments comprehensively. Therefore, this study was conducted to design and psychometrical evaluation a comprehensive tool for safety evaluation in university laboratory complexes.
Materials and Methods: In the first stage, a Checklist was developed across various areas through a process that involved using a literature review, field visits, Interviews with laboratory technicians, and creating videos from multiple laboratories. The initially designed questionnaire was sent to 10 safety experts for face validity, and then their comments on the question phrasing were considered. To assess the content validity, two measures were employed: the Content Validity Ratio (CVR) and the Content Validity Index (CVI). Additionally, the reliability of the instrument was evaluated using Cronbach's alpha calculation method.
Results: In the initial stage, a total of 286 questions were designed within 9 different areas. Subsequently, 49 questions were removed by expert members due to overlapping concepts, resulting in a final questionnaire consisting of 237 questions. The content validity index and relative coefficient were found to be above 0.8 in all areas, indicating strong content validity. Furthermore, Cronbach's alpha value exceeded 0.7 in all areas, suggesting a desirable level of reliability for the designed program.
Conclusion: The results of this study demonstrate that the developed questionnaire exhibits acceptable levels of validity and reliability. As such, it can serve as a comprehensive and suitable tool for monitoring safety in University complex laboratories.
Fatemeh Nematolahi, Agrin Mohammadi, Ladan Zarshenas,
Volume 16, Issue 3 (10-2024)
Abstract
Introduction: Impulsivity means acting with the least thought towards future behaviors or acting based on thoughts that are not the best option for a person or others. This study was conducted to investigate psychometric properties of the Persian version of the Impulsive Behavior Scale (IBS) of Barratt on pre-hospital personnel of Shiraz University of Medical Sciences in 2023.
Materials and Methods: This methodological study was conducted 18 pre-hospital emergency centers of Shiraz University of Medical Sciences during 2022-2023. In this study, the Persian version of the IBS has been used. Face and content validity of the scale in this study was confirmed using qualitative and quantitative methods, and construct validity was confirmed by exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). The reliability of the questionnaire was calculated by Cronbach's alpha and intra-class correlation coefficient (ICC) for each field and the scale.
Results: The IBS had three unplanned, motor and attentional subscales with 23 items and the varimax rotation showed variance of 52.06%. In CFA, root mean square error of approximation (RMSEA) was equal to 0.093 and normalized fit index (NFI), comparative fit index (CFI), goodness of fit (GFI) and incremental fit index (IFI) were higher than 0.9. Cronbach's alpha coefficient in the scale was 0.85%, and the intra-subject correlation coefficient (ICC) was 0.84%.
Conclusion: The study results showed that the scale for pre-hospital personnel had the required validity and reliability, and it can be used for the impulsive behavior in pre-hospital personnel.
