absrtact   aim and background: autistic traits may present in normal population without interfering with daily functionings. the present investigation is to find factor structure and validation of broad autism phenotype questionaire (bapq) and comparing psychometric structures of it with autsim quotient (aq). methods and materials: in this correlational study, 351 students in shahid beheshti un...

Sparse principal component analysis is a very active research area in the last decade. It produces component loadings with many zero entries which facilitates their interpretation and helps avoid redundant variables. The classic factor analysis is another popular dimension reduction technique which shares similar interpretation problems and could greatly benefit from sparse solutions. Unfortuna...

This paper develops and applies a Bayesian approach to Exploratory Factor Analysis that improves on ad hoc classical approaches. Our framework relies on dedicated factor models and simultaneously determines the number of factors, the allocation of each measurement to a unique factor, and the corresponding factor loadings. Classical identification criteria are applied and integrated into our Bay...

Bi-factor analysis is a form of confirmatory factor analysis originally introduced by Holzinger. The bi-factor model has a general factor and a number of group factors. The purpose of this paper is to introduce an exploratory form of bi-factor analysis. An advantage of using exploratory bi-factor analysis is that one need not provide a specific bi-factor model a priori. The result of an explora...

Reviewing the literature indicated that no validated model was found that examine the extent to which teachers support their students emotionally in EFL classrooms. Therefore the present study elaborated on this issue through developing and validating a teacher emotional support scale in an Iranian English foreign language context. Main components of the scale have been specified based on Hamre...

the aim of this study is the normalization of the wender utah rating scale which is used to detect adults with attention-deficit and hyperactivity disorder (adhd). available sampling method was used to choose 400 parents of children (200 parents of children with adhd as compared to 200 parents of normal children). wender utah rating scale, which has been designed to diagnose adhd in adults, is ...