In structural equation modeling, incremental fit indices are based on the comparison of the fit of a substantive model to that of a null model. The standard null model yields unconstrained estimates of the variance (and mean, if included) of each manifest variable. For many models, however, the standard null model is an improper comparison model. In these cases, incremental fit index values rep...

The aim of this study is assessing the effectiveness of Customer Relationship Management factors in Isfahan tourism and travel agencies by Structural Equation Modeling (SEM). It is practical according to the goal and it’s a kind of descriptive survey in terms of methodology. Research population included all of staffs and managers at tourism and travel agencies in Isfahan in 2012 that 274 of the...

BACKGROUND The Temperament Evaluation of the Memphis, Pisa, Paris, and San Diego Auto-questionnaire (TEMPS-A) is a 110-item questionnaire that assesses five affective temperaments. However, a valid shortened version is desired for large-scale investigations to enhance the compliance of respondents. METHODS A confirmatory factor analysis was conducted among 320 psychiatric patients and 61 gene...

description of lactation curve were investigated using sine function, compare it with two functions (dijekstra and wood). the data contained 32233 dairy milk yield records from 93 first parity iranian holstein cows that had calving between aug. 2008 and jul. 2009. actual milk production per day and subsequently the actual production of each animal were available in the first lactation. lactatio...

BACKGROUND In Western European countries, the prevalence of depressive symptoms is higher among ethnic minority groups, compared to the host population. We explored whether these inequalities reflect variance in the way depressive symptoms are measured, by investigating whether items of the PHQ-9 measure the same underlying construct in six ethnic groups in the Netherlands. METHODS A total of...

aim and background: in this study, the psychometric properties and hierarchal structural validity of short form health survey scale (sf-36) among students using structural equating modeling was investigated. methods and materials: a sample with 310 students (158 male and 152 female) from tehran university were chosen by multistage sampling method. for verifying discernment validity, two clinica...

abstract background: due to increasing recognition of the importance of death anxiety for understanding human nature, it is important that researchers who investigate death anxiety have reliable and valid methodology to measure. the purpose of this study was to evaluate the validity and reliability of the persian version of templer death anxiety scale (tdas) in family caregivers of cancer patie...