retain aberrant anchor items. Three methods of detection were explored; (1) delta plot, (2) IRT b-parameter plots, and (3 … for eliminating the use of flagged items for linking assessments when a matrix-sampling design is used and a large number … of items are used within that anchor. While neither the delta nor the IRT b-parameter plot methods produced results that …

calibration with unidimensional IRT models, as well as to examine its robustness to various multidimensional test structures. In … unidimensionality since the performance of the concurrent calibration with the unidimensional IRT models declined significantly with the … notable and significant effects on the equating results appeared to be those due to the factor of group ability distributions …

An important advantage of item response theory (IRT) is increased flexibility for methods of test equating. Several …'s linking procedure. A recent development in IRT has been the introduction of Testlet Response Theory (TRT) models, in which … the scale linking procedures that are based on the 3-PL IRT model and the graded response model. An operational data …

study distinctive response time models incorporated in IRT were compared, and the relationship between item characteristics …

examinee parental education using a single group equating design. Old and new form groups with common item effect sizes (ESs …) ranging from 0 to 0.75 were created by sampling examinees based on their level of parental education. Equating was conducted … for four common item nonequivalent group design equating methods: frequency estimation, chained equipercentile, IRT true …

Magistro baigiamajame darbe nagrinėjami IRT įgalinti paslaugų gamybos ir prekybos pokyčiai, kuriuos kai kurie … esminėmis laikytinomis paslaugų savybėmis pagrįstas teorinis modelis, nagrinėjamas IRT, kaip pamatinio pokyčių veiksnio …

To address the lack of attention to construct shift in IRT vertical scaling, a bifactor model is proposed to estimate … addition, the unidimensional IRT (UIRT) estimation model that ignores construct shift is examined to represent the current … practice for IRT vertical scaling; comparisons on parameter estimation accuracy of the bifactor and UIRT models are discussed …

Item-level fit indices (IFI) in item response theory (IRT) are designed to assessthe degree to which an estimated item … parameters was also examined. The crossedbetween-subjects conditions were: IRT model (1-, 2-, and 3 parameter); data noise … influenced by IRT model and discrimination; only for LM(b) did empiricalsampling distributions tend to approach theoretical …

Recently, researchers have reformulated Item Response Theory (IRT) models into multilevel models to evaluate clustered … correspond directly with IRT models’ parameters is often referred to as multilevel measurement modeling. Unlike conventional IRT …).Limitations in terms of the minimum sample size and number of test items that permit reasonable one-parameter logistic (1-PL) IRT …