The current study aimed to examine differential item functioning (DIF) of a numerical ability test for Gulf state school students. This examined the DIF items by gender and country using two analysis methods; Likelihood Ratio Test (LRT) Mantel-Haenszel (MH). sample size was 2689 individuals throughout grades 5 6, researchers used MH with SPSS LRT BILOG-MG. classification stability coefficient k...

In this paper, group-wise successive interference cancellation (GSIC) receiver with adaptive minimum mean squared error (MMSE) detection and extended GSIC (EGSIC) receiver with adaptive MMSE detection are proposed for dualrate DS-CDMA system. Users are divided into 2 groups for their data rates: high-rate (HR) users and low-rate (LR) users. Initial bit estimates for the HR users are obtained by...

OBJECTIVES This study investigates the effect of surgical margins and radiotherapy, in the presence of individual baseline characteristics, on survival in a large population of high-grade soft tissue sarcoma of the extremities using a multistate model. DESIGN A retrospective multicentre cohort study. SETTING 4 tertiary referral centres for orthopaedic oncology. PARTICIPANTS 687 patients w...

An accurate axis-finding technique is required to measure any changes from normal caused by total knee arthroplasty in the flexion-extension (F-E) and longitudinal rotation (LR) axes of the tibiofemoral joint. In a previous paper, we computationally determined how best to design and use an instrumented spatial linkage (ISL) to locate the F-E and LR axes such that rotational and translational er...

OBJECTIVES This study was developed to determine contemporary management of digoxin toxicity and clinical outcomes. BACKGROUND Although the use of digoxin in heart failure management has declined, toxicity remains a prevalent complication. METHODS The Premier Perspective Comparative Hospital Database (Premier Inc., Charlotte, North Carolina) was used to retrospectively identify patients dia...

Title of Dissertation: EXAMINING DIFFERENTIAL ITEM FUNCTIONING FROM A LATENT CLASS PERSPECTIVE Karen Samuelsen, Doctor of Philosophy, 2005 Dissertation directed by: C. Mitchell Dayton Department of Measurement, Statistics and Evaluation Current approaches for studying differential item functioning (DIF) using manifest groups are problematic since these groups are treated as homogeneous in natur...

The main goal of this paper is to propose a probability model for computing probabilities of dismissal of 10b-5 securities class-action cases filed in United States Federal district courts. By dismissal, we mean dismissal with prejudice in response to the motion to dismiss filed by the defendants, and not eventual dismissal after the discovery process. The proposed probability model is a hybrid...

The presence of differential item functioning (DIF) in a test suggests bias that could disadvantage members of a certain group. Previous work with tests of visual learning abilities found significant DIF related to age groups in a car test (Lee, Cho, McGugin, Van Gulick, & Gauthier, 2015), but not in a face test (Cho et al., 2015). The presence of age DIF is a threat to the validity of the test...