The proposal for increasing the security in Computerized Adaptive Tests that has received most attention in recent years is the a-stratified method (AS - Chang and Ying, 1999): at the beginning of the test only items with low discrimination parameters ( a ) can be administered, with the values of the a parameters increasing as the test goes on. With this method, distribution of the exposure rat...

In many instances of price discrimination, a seller of an item is in possession of signals from competing buyers regarding their private valuation for the item. While intuition may suggest that a seller should always exploit all available information, our paper shows that it is actually in the interests of the seller to strategically ignore the information contained in the signals with positive...

The White Bear Suppression Inventory (WBSI; Wegner & Zanakos, 1994) was designed to assess thought suppression as a dispositional characteristic. Researchers examining the WBSI have found support for a unidimensional construct although multi-dimensional factorial solutions have been suggested. In the current study, we used item response models to examine the primary factor underlying the WBSI. ...

ABSTRACT Objectives: to assess the reliability and validity of 46 items version comfort scale for family members people in critical condition. Methods: a methodological study, carried out with 278 critically ill patients, admitted adult pediatric intensive care units, city interior state São Paulo, Brazil. The analyzes were based on Classical Test Theory Item Response Theory. Results: Horn’s pa...

Purpose – The main aim of this paper is to describe the development of a scale designed to measure self-efficacy for information literacy. Design/methodology/approach – Cronbach’s alpha, item analysis and item discrimination indices, principal component analysis, varimax rotation, and discriminant validity were used to measure reliability and validity of the scale. A 28-item refined version of ...

For test-sheet composition systems, it is important to adaptively compose test sheets with diverse conceptual scopes, discrimination and difficulty degrees to meet various assessment requirements during real learning situations. Computation time and item exposure rate also influence performance and item bank security. Therefore, this study proposes an Adaptive Test Sheet Generation ATSG mechani...

The Wisconsin Schizotypy Scales are widely used for assessing schizotypy in nonclinical and clinical samples. However, they were developed using classical test theory (CTT) and have not had their psychometric properties examined with more sophisticated measurement models. The present study employed item response theory (IRT) as well as traditional CTT to examine psychometric properties of four ...

Item response theory (IRT) is an important method of assessing the validity of measurement scales that is underutilized in the field of psychiatry. IRT describes the relationship between a latent trait (e.g., the construct that the scale proposes to assess), the properties of the items in the scale, and respondents' answers to the individual items. This paper introduces the basic premise, assum...

Trait emotional intelligence refers to a constellation of emotional self-perceptions located at the lower levels of personality hierarchies. In 2 studies, we sought to examine the psychometric properties of the Trait Emotional Intelligence Questionnaire-Short Form (TEIQue-SF; Petrides, 2009) using item response theory (IRT). Study 1 (N= 1,119, 455 men) showed that most items had good discrimina...