This paper examines the construct validity and reliability of the Psychological Well-Being Scale (PWBS) according to the Persian culture and language. Participants (N=577) from a population study of university students were chosen. Confirmatory factor analysis using AMOS software was performed in two steps. In step one, 18 models derived from 3-, 9-, and 14-item forms that emphasized gender dif...

OBJECTIVE To describe the development and psychometric properties of the SCI-QOL Psychological Trauma item bank and short form. DESIGN Using a mixed-methods design, we developed and tested a Psychological Trauma item bank with patient and provider focus groups, cognitive interviews, and item response theory based analytic approaches, including tests of model fit, differential item functioning...

OBJECTIVE To calibrate the Dutch-Flemish version of the PROMIS physical function (PF) item bank in patients with rheumatoid arthritis (RA) and to evaluate cross-cultural measurement equivalence with US general population and RA data. METHODS Data were collected from RA patients enrolled in the Dutch DREAM registry. An incomplete longitudinal anchored design was used where patients completed a...

We study a variety of NP-hard bin packing problems under a divisibility constraint that generalizes the often encountered situation in which all item sizes are powers of 2. For ordinary one-dimensional bin packing, we show that First Fit Decreasing produces optimal packings under this restriction, and that if in addition the largest item size divides the bin capacity, then even the less powerfu...

The widely used Social Interaction Anxiety Scale (SIAS; R. P. Mattick & J. C. Clarke, 1998) possesses favorable psychometric properties, but questions remain concerning its factor structure and item properties. Analyses included 445 people with social anxiety disorder and 1,689 undergraduates. Simple unifactorial models fit poorly, and models that accounted for differences due to item wording (...

A sample of 741 university students completed the Revised Cheek and Buss Shyness scale. Item analysis showed that the scale has sound psychometric properties. There was no gender difference in total shyness scores although there were differences on two of the 14 items. A series of confirmatory factor analyses tested the fit of several models of the factor structure of the scale and showed that ...

Combining items into parcels in confirmatory factor analysis (CFA) can improve model estimation and fit. Because adequate model fit is imperative for CFA tests of measurement invariance, parcels have frequently been used. However, the use of parcels as indicators in a CFA model can have detrimental effects on tests of measurement invariance of factor loadings. Using simulated data with a known ...

Background The aim of this study is to evaluate the psychometric properties of the Persian versionof the Edinburgh Postnatal Depression(EPDS) among Iranian mothers in postpartum period. Materials and Methods: This secondary analysis examines 200 Iranian mothers registered to receive prenatal care in health centers in Kerman, Iran. ...

INTRODUCTION This study aimed to evaluate the validity and reliability of the Multidimensional Body Image Scale (MBIS), a seven-factor, 62-item scale developed for Malaysian female adolescents. This scale was evaluated among male and female Malaysian university students. METHODS A total of 671 university students (52.2% women and 47.8% men) completed a self-administered questionnaire on MBIS,...