Showing 4 results for Reliability
Rs Hajimirmohammad Ali, H Karyab, Ha Jamali, Mm Emamjome, F Ansari Maleki, A Arezomand,
Volume 9, Issue 4 (3-2017)
Abstract
Improper and incorrect implementation of sewage collection networks can cause environmental and health problems. It also causes dissatisfaction in urban residents. The purpose of this study was to design a questionnaire for evaluating satisfaction level of urban residents from sewage collection network. Face validity index, content validity ratio and Cronbach-coefficient were used to evaluate validity and internal consistency. The evaluated indexes were assessed in acceptable levels. The designed tool that was included 25 variables can be used to assess satisfaction level by researchers and wastewater companies.
O Nasri, M Yunesian, M Alimohammadi, N Shalyari, S Masoomi, M Shamsipour,
Volume 12, Issue 4 (2-2020)
Abstract
Background and Objective: Regular use of household cleaning products and cosmetics can result in adverse consequences for human health. Therefore, the knowledge of consumption pattern of these products can help to evaluate the effects and finally control the consequences of their inappropriate application. As there is not an appropriate tool for evaluating public use-pattern for these products in Iran, we studied the reliability and validity of a questionnaire designed for the use-patterns of these products.
Materials and Methods: In the present study, a questionnaire, which was previously applied in similar studies for this purpose, was first translated to Persian. Then, some changes were made in the questionnaire according to the studied population. In the next step, the assessment of both content validity and face validity of the instrument was performed. Finally, the questionnaire reliability was studied in two test-retest steps at a 14-day interval with 40 subjects older than 14 years old being resident in Tehran city.
Results: Total Content Validity Index (CVI) of this questionnaire ranged 0.66-1 for all question items. Cronbach's alpha coefficient was 0.814. The correlation assessment of each question item based on the total correlation score showed that all questionnaire items had a direct and strong correlation with the total instrument score.
Conclusion: Given the acceptable validity and reliability obtained for the questionnaire in Persian in this study, it can be used in those investigations that evaluate use patterns or asses the exposure risks to chemical pollutants from cosmetic products or detergents.
Faezeh Kamal, Reza Fouladi Fard, Azam Sabahi Hoveida, Zabihollah Gharlipour, Nayereh Rezaie Rahimi,
Volume 14, Issue 2 (9-2021)
Abstract
Background and Objective: The most important first step in promoting environmental performance is identifying and evaluating environmental behavior. In this regard the measuring tool is considered an environmental behavior questionnaire. Validity and reliability of the questionnaire before its application is essential. Thus this research was conducted with the aim of assessing the validity and reliability of questionnaires.
Materials and Methods: The environmental behavior questionnaire containing 36 questions was designed using the literature review and expert panel opinions. Then, the validity of the questionnaire was assessed by content validity index (CVI) and content validity ratio (CVR) and its reliability was evaluated using Cronbach's alpha coefficient by 14 experts and 40 target groups. Finally, data were analyzed by SPSS 20 software.
Results: The results showed that the questionnaire with 36 items had CVI and CVR of 0.896 and 0.726, respectively, and 4 items should be excluded from the questionnaire due to non-compliance with content validity indices. The questionnaire exhibited high internal consistency and hence was acceptable owing to the Cronbach's alpha coefficient of 0.85.
Conclusion: The questionnaire was designed to evaluate environmental performance of citizens and can be cited in future studies.
Naseh Shalyari, Ramin Nabizadeh, Mohsen Vijeh, Omid Nasri, Farnaz Saeidi, Masud Yunesian,
Volume 14, Issue 2 (9-2021)
Abstract
Background and Objective: In assessing the risk of community related poisonings due to insecticide use a practical and effective tool is needed to evaluate insecticides Therefore, the present study aimed to investigate the reliability and validity of exposure patterns to insecticides.
Materials and Methods: In this study, after performing validity, translation of the final version of the questionnaire was prepared based on the agreement of experts in accordance with the study population. In the next step, the reliability validity of the study was investigated. Finally, the questionnaire reliability was evaluated by test-retest method at a 14-day interval with the participation of 40 resident of Tehran city.
Results: The results of R-CVI and C-CVI were evaluated as good for all of items (between 0.91 and 0.97). The total CVI index for the whole questionnaire ranged from 0.75 to 1 in terms of proportion and transparency. On the other hand, the total coefficient of kappa for reliability of the questionnaire was obtained between 0.89 and 1.
Conclusion: Considering the acceptable validity and reliability level of the Persian version, this questionnaire is a valid tool and can be applied to assess the risk of insecticide use and its associated injuries in the Iranian population.
