Given data y and k covariates x one problem in linear regression is to decide which in any of the covariates to include when regressing y on the x. If k is small it is possible to evaluate each subset of the x. If however k is large then some other procedure must be use. Stepwise regression and the lasso are two such procedures but they both assume a linear model with error term. A different ap...

methods the current cross sectional study included all female high school students in tehran in the 2014 - 2015 academic year. of these, 477 females were selected by multistage cluster sampling. results the results of the correlation matrix was indicative of a significant negative relationship between self-esteem and self-concept clarity with social comparison (p < 0.000). there was a significa...

the aim of this study was to determine the role of attachment styles and cognitive emotion regulation strategies in adolescents&apos; social anxiety. 430 iranian high school students (200 boys and 230 girls) were selected by multistage cluster sampling method from high schools in isfahan city and completed a battery of scales including attachment styles scale (collins and read, 1990), cognitive...

caesarean section (c-section) rates have been increasing dramatically in the past decades around the world. this increase has been attributed to multiple factors such as maternal, socio-demographic and institutional fac-tors. therefore, this study examines the impact of maternal, socio-demographic and relevant characteristics on caesar-ean delivery in the northern region of bangladesh.this stud...

abstract aim and background: this study aims to predict self-care behavior based on the characteristics of hardiness , hope and dysfunctional attitudes in patients with type 2 diabetes. methods and materials: study design was a descriptive correlation method. the target population was all patients with diabetes type 2 who referred to isfahan endocrine and metabolism centers. the sample consiste...

The study has modified UTAUT (Venkatesh et. al., 2003) to determine technology acceptance of web-based learning system of Taiwan technical university students. This study used cluster sampling and stepwise regression analysis to determine the relationships among constructs. Research results showed that performance expectancy, attitude toward using technology, facilitating conditions, self-effic...