Item response theory (IRT) models are factor for dichotomous or polytomous variables (i.e., item responses). The symmetric logistic probit link functions most frequently utilized modeling items. In this article, we propose an IRT model and items using the asymmetric generalistic function that covers a lot of functions. Compared to based on function, generalized additionally estimates two parame...

Although a growing body of empirical literature provides some support for the diagnosis of borderline personality disorder (BPD) in youth, little is known about the internal structure of BPD and the performance of the individual diagnostic criteria, especially in younger samples. We used item response theory (IRT) methods to investigate the psychometric properties of the Diagnostic and Statisti...

When using functional brain imaging to study neuropsychiatric patients an important challenge is determining whether the imaging task assesses individual differences with equal precision in healthy control and impaired patient groups. Classical test theory (CTT) requires separate reliability studies of patients and controls to determine equivalent measurement precision with additional studies t...

This study aims to validate the Dutch-Flemish PROMIS pediatric item banks v2.0 Anxiety and Depressive Symptoms, short forms 8a, computerized adaptive tests (CATs) in a general Dutch population provide reference data. Participants (N = 2,893, aged 8–18), recruited by two internet survey providers, completed both banks. These were assessed on unidimensionality, local independence, monotonicity, G...

BACKGROUND The eHealth Literacy Scale (eHEALS) is a tool to assess consumers' comfort and skills in using information technologies for health. Although evidence exists of reliability and construct validity of the scale, less agreement exists on structural validity. OBJECTIVE The aim of this study was to validate the Italian version of the eHealth Literacy Scale (I-eHEALS) in a community sampl...

objective: this study has used item response theory (irt) to examine the psychometric properties of health-related quality-of-life. method: this investigation is a descriptive- analytic study. subjects were 370 undergraduate students of nursing and midwifery who were selected from tabriz university of medical sciences. all participants were asked to complete the farsi version of whoqol-bref. sa...

Item response theory (IRT) models emerged to solve practical testing problems in large-scale cognitive achievement and aptitude assessment. Within the last decade, an explosion of IRT applications have occurred in the non-cognitive domain. In this report, I highlight the development, implementation, and results of a single project: Patient Reported Outcomes Measurement Information Systems (PROM...

DOCUMENT RESUME TM 030 621 Hanson, Bradley A.; Beguin, Anton A. Separate versus Concurrent Estimation of IRT Item Parameters in the Common Item Equating Design. American Coll. Testing Program, Iowa City, IA. ACT-RR-99-8 1999-12-00 36p. ACT Research Report Series, PO Box 168, Iowa City, IA 52243-0168. Reports Evaluative (142) MF01/PCO2 Plus Postage. *Equated Scores; Estimation (Mathematics); *It...

Item response theory (IRT) models are a class of generalized mixed effect (GME) models used by psychometricians to describe the response behavior of individuals to a set of categorically scored items. The typical assumptions of IRT are Unidimensionality (U) of the random effect; Conditional (or Local) Independence (CI), the item responses are independent given the random effect; andMonotonicity...