The current study reports the development and psychometrics of a figure rating scale with leanness and muscularity dimensions and a 13-item questionnaire assessing symptoms associated with muscle dysmorphia (MD). Three separate samples of men and women completed the muscle dysmorphic disorder inventory (MDDI), the bodybuilder image grid (BIG) or both to measure 1-week test-retest reliability, i...

Using item response theory (IRT), we examined the Rheumatoid Arthritis Self-efficacy scale (RASE) collected from a People with Arthritis Can Exercise RCT (346 participants) and 2 subscales of the Arthritis Self-efficacy scale (ASE) collected from an Active Living Every Day (ALED) RCT (354 participants) to determine which one better identifies low arthritis self-efficacy in community-based adult...

As biomarkers are lacking, multi-item questionnaire-based tools like the Positive and Negative Syndrome Scale (PANSS) are used to quantify disease severity in schizophrenia. Analyzing composite PANSS scores as continuous data discards information and violates the numerical nature of the scale. Here a longitudinal analysis based on Item Response Theory is presented using PANSS data from phase II...

The International Mental Health Assessment (IMHA) was developed to provide efficient screening facilitate prevention and early intervention among employees or community adults at three levels of analysis: a P-factor general functioning tendency toward disorder; broad spectra internalizing externalizing tendencies for life difficulties; nine subscales common, familiar psychological behavioral he...

The paper takes the operation center of D company as an example, studies the packing material inventory control. Grouping by ABC classification, the paper establishes the joint order of multi-item inventory control model to determine the optimal order cycle, achieving the purpose of reducing inventory levels and inventory cost. Keywords-packing materials; inventory; joint order; multi-item

There are few psychometrically sound measures of coping in adults. Widely used have highly unstable sub-scale analyses, were developed on homogenous samples, and outdated. The scarcity empirically derived instruments is concerning given that skills linked to a variety positive negative physical mental health outcomes (e.g., substance use, depression). Thus, the aim current study was develop mea...

Objective: The Vancouver Obsessional Compulsive Inventory (VOCI) is a self-report inventory developed to assess a wide range of obsessive-compulsive symptoms, including contamination (12 items), checking (6 items), obsessions (12 items), hoarding (7 items), just right (12 items), and indecisiveness (6 items). The English version of the VOCI has been shown to be a promising psychometric instrume...

purpose: the aim of present study was to examining the psychometric properties of the iranian version of short dark triad (sd3) in students. methodology: the study sample consisted of bu-ali sina university students in 2015-2016. 376 students were selected based on multi-stage cluster sampling. to study psychometric characteristics of the scale, dark triad scale was translated with double-trans...

PURPOSE To assess and validate the subscale structure of the 28-item Impact of Visual Impairment (IVI) Scale by using confirmatory factor analysis (CFA) and Rasch analysis for use as an outcome measure. METHODS Three hundred nineteen participants completed the IVI questionnaire, and the responses then were subjected to Rasch analysis by RUMM2020 software. With the person estimates for each it...