Showing 8 results for Validity
S Nejat , A Montazeri , K Holakouie Naieni , K Mohammad , S.r Majdzadeh ,
Volume 4, Issue 4 (7-2006)
Abstract
Background and Aim: In 1991, the world health organization initiated a project to simultaneously develop an instrument for measuring quality of life in 15 countries. The study yielded two questionnaires, namely WHOQOL-100 and WHOQOL-BREF. These were intended as generic QOL measurement tools to be used in a broad range of diseases, for different degrees of disease severity, and in various cultural subgroups. The objective of the current study was to evaluate the Iranian version of the WHOQOL-BREF. This 26-item instrument comprises four domains: Physical Health, Psychological, Social Relationship, Environment and the overall QOL/health.
Material and Methods: We administered the questionnaire to 1167 adults in Tehran. The stratified sample consisted of 476 diseased subjects and 700 healthy ones. We tested the instrument's reliability (internal consistency, test-retest), discriminant validity and factorial structure.
Results: The participants had an age mean of 36.3 years (SD = 13.2) and had an average 11.5 years of education. Using Cronbach's α and intraclass correlation, all domains met the minimum reliability standards, with the exception of social relationship domain (α = 0.55). The latter could be attributed the small number of questions in this domain and the sensitive nature of the questions themselves. Since 83% of the questions show maximum correlation with their original domain, the factorial structure of the questionnaire was regarded as acceptable. The questionnaire has the ability to discriminate different groups after adjustment for confounding factors in regression analysis.
Conclusion: This study demonstrated good to excellent reliability and acceptable validity in various groups of subjects in Iran. The instrument may be used in future studies, albeit with minor modifications in the domain of social relations, as determined by expert opinion.
Zahra Hosseinkhani, Saharnaz Nedjat, Reza Majdzadeh, Manoochehr Mahram, Ali Aflatooni,
Volume 11, Issue 3 (1-2014)
Abstract
Background and Aim: Child abuse is a social problem that affects the lives of children. The purpose of this study was to design a valid and reliable Persian questionnaire to measure the status of child abuse.
Materials and Methods: Content validity was measured with search of relevant electronic databanks, preparation of the first draft of the questionnaire and determinant of its relevancy and clarity. Reliability was measured with Cronbach’s alpha, and repeatability was measured with intra cluster correlation through test-retest with two weeks interval.
Results: The mean of clarity and relevancy of the tool were 80.36% and 92.5%, respectively, and rang of these two measure were 90.14 - 97.2, also. The average of intra cluster correlation (ICC) and Cronbach’s alpha were 0.95 and 0.92, respectively.
Conclusion: The new tool has acceptable validity and reliability and is suitable for child abuse studies in Iran.
Mohsen Haddadi, Abolfazl Zakerian, Mahmood Mahmoodi, Jebraeil Nasl Seraji, Zohreh Parsa Yekta, Abolfazl Ali Yari,
Volume 12, Issue 1 (5-2014)
Abstract
Background and Aim : Diagnostic tools for chronic fatigue syndrome, chronic fatigue syndrome questionnaire, created for research and clinical investigations in order to use it as a management tool for monitoring patients with this syndrome. The questionnaire is very comprehensive using a self-reporting system and all internal and external definitions according to the America's Center for Disease Control has been covered. It also assesses current and past activity levels and symptoms of fatigue and malaise after routine daily activities to ensure that these items are evaluated as well. The purpose of this study is to evaluate the reliability and validity of diagnostic questionnaire for Chronic Fatigue Syndrome (CFS).
Materials and Methods : In the discussion of content validity and reliability of survey studies, chronic fatigue syndrome questionnaire, prepared by the Department of Psychology, DePaul University, and was elected a full copy of the correspondence received from the questionnaire ratings. The questionnaire that was translated content validity was assessed by the 20 members of the faculty. However, re-translated from Persian into English for reference, was prepared with modifications, the validity of its validity was confirmed by the authors. Then, 30 nurses were selected to determine the reliability of the questionnaire chronic fatigue syndrome who was working in a Hospital. Inventory management under center and full justification of the researcher and the participants in the study by researchers at the distribution has been completed. The survey was carried out again after 15 days.
Results: The instrument showed good reliability and validity. In discussing the content validity of the Persian translation tool by 20 people associated professor of internal review, and its content validity was determined with respect to two of CVI and the results of CVR , and (CVR=0.7 and CVI=0.85) represents CREDIT the content is good . According to the results, the reliability of the questionnaire CFS, Cronbach's alpha to assess the results of the questionnaire showed very good reliability. Two step test reliability coefficients (ICC = Mixed & and Confidence Interval = 95%) also showed a significant relationship among questions as well. However, the internal correlation coefficient obtained for the 8 criteria CFS, showed high internal cohesion.
Conclusion: This study suggests the CFS questionnaire as a reliable instrument for all levels in research and clinical applications. Using this tool can help with background checks and even in advanced levels to be effective, it has enough power and accuracy in the diagnosis of CFS sufferers.
Adel Mazloumi, Zeynab Kazemi, Abbas Rahimi Foroushani, Meysam Eivazlou,
Volume 12, Issue 1 (5-2014)
Abstract
Background and Aim: Work ability reflects the interactions among personal characteristics, working conditions, employees' functional capabilities, and also employees' health status. Hence, the aim of the present study was to provide the Farsi version of Work Ability Index and to validate it among Iranian workers.
Materials and Methods: In the first stage, Backward Translation method was used for linguistic validation of the questionnaire. Cross sectional survey of a sample of 645 workers from some Iranian companies were conducted. The study estimated the reliability of the questionnaire by means of test-retest, as well as the construct validity using factor analysis. In order to determine discriminant capacity, the mean scores of different dimensions of work ability index were compared between workers with and without sick leave.
Results: Accordingly, the questionnaire showed a good internal consistency. ICC coefficients for the questionnaire were acceptable. Moreover, factor analyses related to the questionnaire items indicated that only one question is sufficient for each item of "work ability in relation to the demands of the job" and "mental resources". Also, questions related to the item of "number of current diseases diagnosed by physician" can be integrated in six questions. A good level of discriminant validity was observed for all dimensions except for the item of "work ability regarding work demands".
Conclusion: According to the acceptable validity and reliability of Work Ability Index, obtained in the present study, using this questionnaire for evaluating workers' work ability in all Iranian work environments, especially in industrial settings, is recommended.
Zohreh Rahaei, Fazllolah Ghofranipour, Mohammad Ali Morowatisharifabad, Eisa Mohammadi,
Volume 12, Issue 3 (1-2015)
Abstract
Background and Aim: Cancer is the third cause of mortality in Iran, killing more than 30000 persons annually. The Motivation Theory is a useful approach for predicting and planning intervention programs to change behaviors related to cancer prevention and early detection. Considering the absence of a valid and reliable protection motivation theory questionnaire for cancer early detection in Iran, this study was conducted to design such a questionnaire and assess its psychometric properties in Yazd
Materials and Methods: This was a cross-sectional study. A questionnaire was designed based on similar questionnaires currently in use and its validity and reliability were determined. The reliability coefficients were calculated by Cronbach α and intraclass correlation coefficients. To determine the validity of the scale, two methods were used, namely, face validity and content validity. Confirmation factor analysis was used to determine factorial validity using Amous 21 software .
Results: The CVR for all items of the questionnaire, CVI, ICC and internal consistency of the questionnaire were found to be 1, 0.97-1.0, 0.71-0.98, and 0.65-0.93, respectively. The confirmation factor analysis revealed that the questionnaire fitted the Iranian population. The Cronbach alpha coefficient for the questionnaire constructs varied between 0.71-0.98 and 0.65-0.93
Conclusion: The validity and reliability of the Persian version of PMT scale for cancer early detection are acceptable and suitable, so it can be used in similar research.
Afzal Akbari Baloutbangan, Siyavosh Tlepasand,
Volume 12, Issue 4 (3-2015)
Abstract
Background and Aim: Bullying a form of persecution, physical, sexual and psychological one or more students against another student repeatedly over a period of time. The aim of this study was to evaluate the psychometric characteristics of the bullied scale in elementary school.
Materials and Methods: The study population all elementary students in Semnan in the 2013-14 school year. To this end, 607 students of Semnan were selected by using a stratified sampling method. All of them Harter's bullying Scale, Illinois bullying and Harter’s motivation questionnaire to complete. Data in the context two classical theories and the test-questions theory analyzed. Exploratory factor analysis, item-total correlation and reliability analyses were undertaken to assess the psychometric properties of the Harter's bullying Scale. The Sami Jima answers Scaled model Fitness data were used for analysis.
Results: Results showed Harter’s bullying scale of factor is saturated. Rating scale using Cronbach's alpha coefficient bullying Harter’s 0.74 respectively. Harter's bulling scale significant positive correlation with absence from school and with academic motivation, academic achievement and discipline scores showed a significant negative relationship. Data answer questions Harter’s scale with Samejima model had a good fitness and more information about the test showed that the slopes of -0.8 to +2.2 continuums feature.
Conclusions: Persian version of Harter's bullying scale had acceptable psychometric properties and could be used as reliable and valid instrument in psychological research.
Afzal Akbaribalootbangan, Mahmood Najafi, Jalal Babaee,
Volume 14, Issue 1 (6-2016)
Abstract
Background and Aim: The present research aimed to study the psychometric characteristics of a subjective well-being questionnaire among high school students.
Materials and Methods: This was a descriptive correlational study. A total of 400 high school students (200 boys and 200 girls) in the City of Ghom, Iran were selected by multistage cluster sampling. Data were collected using the Oxford subjective well-being and happiness inventory questionnaire. Factor analysis and Cronbach's alpha coefficient and the Pearson correlation test were used to analyze the data.
Results: Factor analysis showed that the scale was saturated with four factors. In addition, Pearson correlation test indicated that subjective well-being was positively associated (p < 0.01) with happiness (r=0.27), discipline (r=0.11) and academic achievement (r=0.28). Also the reliability of the subjective well-being questionnaire using Cronbach's alpha was found to be 0.87 for the total scale and 0.69, 0.85, 0.73 and 0.78 for the subscales school connectedness, joy of learning, educational purpose and academic efficacy, respectively; these findings indicate that the tool used was quite good and reliable.
Conclusions: Based on the findings is concluded that the Persian version of the subjective well-being questionnaire is an acceptable tool to determine the psychometric characteristics of high school students and can be used as a valid instrument in psychological research.
Elham Faez, Seyed Abolfazl Zakerian, Kamal Azam,
Volume 16, Issue 3 (12-2018)
Abstract
Background and Aim: Ergonomics climate indicates employee perceptions of the extent to which the organization emphasizes and supports the design and modification of work, so that both performance and well-being of the personnel are improved. The purpose of this study was to determine the validity and reliability of the Persian version of the ergonomics climate assessment questionnaire in order to create a suitable tool for determining the overall values of an organization in connection with ergonomics and climate assessment.
Materials and Methods: First, the ergonomics climate assessment questionnaire was obtained from the Colorado State University of America, where it had been developed. The back-translation method was used to confirm its language suitability and precision. The content validity of the questionnaire was assessed by 10 relevant experts, followed by a cross-sectional study using a sample of 50 employees of a power generation plant using Cronbach's alpha to determine its reliability.
Results: The content validity ratio (CVR), content validity index (CVI) and reliability of thequestionnaire were found to be 0.90, 0.94 and 0.96 (a for the 59 items), respectively. These resultsindicating that the questionnaire is a valid and reliable tool.
Conclusion: Considering the acceptable validity and reliability of the ergonomic climate assessment questionnaire, it can be used as a valid and reliable tool to assess and analyze the status of ergonomic climate in different industries and organizations in Iran.
