negar sharifi; mohammad falsafi; noorali farokhi; ehsan jamali
Abstract
Background: Test fairness is one of the main challenges in transition from paper- pencil towards computerized adaptive testing (CAT). Aim: This study was aimed at investigating differential item function (DIF), assessing intervening factors in clarifying DIF and suggesting the optimal method for DIF ...
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Background: Test fairness is one of the main challenges in transition from paper- pencil towards computerized adaptive testing (CAT). Aim: This study was aimed at investigating differential item function (DIF), assessing intervening factors in clarifying DIF and suggesting the optimal method for DIF in computerized adaptive testing. Method: The empirical method was applied based on the nature of the study area. Data gathering procedure and manipulating the variables were done using simulation method. The responses of 1000 examinees (reference and focal group with equal 500 numbers) to item bank of 55 dichotomous items were simulated based on 3-parameter logistic model with 20 iterations. Fifteen items were manipulated in terms of DIF type and magnitude and test impact was evaluated based on mean difference of comparison groups. Computerized adaptive test with 30 items was administered via Firestar software package. Analysis was done by logistic regression (LR) and item response theory-likelihood ratio test (IRT-LRT) and the methods were compared based on their power and type I error rate. Results: Type I error rate of likelihood ratio test was less than logistic regression. The power of the methods was influenced by type, magnitude of DIF and test impact. Comparing with logistic regression, Item response theory-likelihood ratio test had more power in detecting uniform DIF for the impact and no-impact conditions and it showed more power by increasing the magnitude of DIF. The two methods showed no difference in assessing non-uniform DIF and both of them were poor. Conclusion: Given the power and type I error rate, likelihood ratio test is an optimal approach in detecting uniform DIF. However, assessing non-uniform DIF requires further investigation.
Enayatollah Zamanpour; Ali Delavar; Noor ali Farrokhi; mohammadAli Babaee Zakliki
Abstract
Background: Although today's univariate statistical analyzes have given way to complex multivariate analysis with rigorous assumptions, these methods can not provide readers with a clear and reliable understanding of these concepts, since the statistical methods mentioned are as pre-determined as the ...
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Background: Although today's univariate statistical analyzes have given way to complex multivariate analysis with rigorous assumptions, these methods can not provide readers with a clear and reliable understanding of these concepts, since the statistical methods mentioned are as pre-determined as the standard, and regardless of The meanings and concepts of the research structures are aimed at fulfilling pre-determined goals and the need for more extensible interpretative methods is quite tangible. Objective: To introduce one of the research approaches called procedural theory, its components and structure, along with the application of the relevant analytical method (analysis of the smallest space) On h data The main purpose of the research is to focus on the focus of the research. Findings: An interpretive approach to procedural theory by using the smallest space analysis allows the identification of different procedures, including position procedures, responsiveness, and interaction as visual representations. Conclusion: Using this approach in analyzing data that has a complex human structure can be a very good way to validate and interpret them closely.
sadegh Taheri; Noor-Ali farrokhi; ahmad borjali; abbas abbaspur
Abstract
Abstract Background: the promotion and appointment of appropriate human resources to accurately and objectively, one of the main factors leading to the success of organizations. Qualified human resources can belong to the power and your thinking its the best use of available resources. Decide on the ...
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Abstract Background: the promotion and appointment of appropriate human resources to accurately and objectively, one of the main factors leading to the success of organizations. Qualified human resources can belong to the power and your thinking its the best use of available resources. Decide on the appointment and promotion of staff in organizations with regard to the issue of competence is a matter of days. Objective: This study aimed to develop a model for the promotion and appointment of staff to middle level management was based on individual and organizational components. Methods: The study population NIOC all employees who were in middle management career in 1312 people were surveyed. Data were analyzed using the software SPSS 22 and Amos. Results: The results of this study indicate that the direct and indirect effects and overall effects of variables management experience, job level and competence of the dependent variable (the manager position) was, to species variables managerial experience and competence on the job order management middle showed a significant effect. Job rank with leadership positions had direct effect. The results of this study, fit and proper indicators, data model has been developed. Conclusion: different variables affecting the promotion and appointment of experts limitations that can affect them from individual and organizational factors, Experts said. Because of the influence of variables management experience, job level and competence of the management, the use of results of research organizations and public and private companies is recommended. Keywords: experience, job rank, competence and managerial position.
masoumeh alimohammadi; Noorali Farakhi
Abstract
This study was done to review effective factors on composition tests’ correction in the third grade of high school by teachers of high school in semnan province, in which 6 questions wer planned. In the present research two groups of men and women teachers, teaching in high schools,participated.at ...
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This study was done to review effective factors on composition tests’ correction in the third grade of high school by teachers of high school in semnan province, in which 6 questions wer planned. In the present research two groups of men and women teachers, teaching in high schools,participated.at first, the research sample, including 97 persons, was prepared from among the population of teachers of geometry, persian literature and history, teaching in the centers of towns and cities of the province, as cluster sampling. Then, for gathering of the samples, we refer to all of boy and girl high schools in two determined cities that have theoretical branches; and provided each teacher of the aforesaid courses, a package including personal information questionnaire,sample questions of the relative courses, correction guidelines of them and 5 tests that were answered by the students (these 5 papers were selected randomly from among the tests of that course). 5 papers of randomly selected of tests of geometry, history and Persian literature of the third grade in high school, were encoding (a half directly as 1 to 5, and the other half indirectly as 5 to 1), and presented to the teachers for correction, in order that correct the papers according to the answers and determined score independent t-test and analysis of variance were used in comparing the average scores gained by different teachers. According to the results, in all of the 6 questions of the study, there is no meaningful difference; excepting question number 1 that in history part, there is a meaningful difference.findings of the study and applying statistical methods demonstrate that factors such as gender of the teachers, academic paper, years of service, gender of the students and rigorousness of the teachers in correction of the composition tests is not effective.
