BACKGROUND For the Low Vision Quality Of Life questionnaire (LVQOL) it is unknown whether the psychometric properties are satisfactory when an item response theory (IRT) perspective is considered. This study evaluates some essential psychometric properties of the LVQOL questionnaire in an IRT model, and investigates differential item functioning (DIF). METHODS Cross-sectional data were used f...

OBJECTIVE To determine the influence of the order in which a series of radiographs were read on the sensitivity to change over a 2-yr follow-up period in patients with osteoarthritis (OA) at multiple sites. METHODS Radiographs of 20 patients with OA in at least two joint sites were obtained at baseline and after 2 yr, and scored according to the consensus of two readers. Joint space narrowing...

A wealth of research has been conducted to compare extensive and intensive reading thanks their increasing popularity in educational settings globally. However, only a limited number studies have measure the effects movie-enriched activities. To this aim, present study was undertaken investigate movie enriched on freshman students` TOEFL IBT vocabulary expansion speaking section scores. In rega...

this research develops thermo-elastic analysis of a functionally graded cylinder under thermo-mechanical loadings. heat conduction equation in cylindrical coordinate system is solved. thermal conductivity coefficient is graded along the radial direction. by considering a symmetric distribution of temperature, loading and boundary conditions, strain-displacement and stress-strain relations can b...

Let $G$ be a group with identity $e$. $R$ $G$-graded commutative ring, $M$ graded $R$-module and $A\subseteq h(R)$ multiplicatively closed subset of $R$. In this paper, we introduce the concept $A$-2-absorbing submodules as generalization 2-absorbing $A$-prime $M.$ We investigate some properties class submodules.