Relationships among IRT item discrimination and item fit indices in criterion-referenced language testing

摘要: This study investigates relationships among the IRT one-parameter fit statistics, two-parameter slope parameter and traditional biserial correla tions in terms of role these indices play criterion-referenced language test construction. It discusses assumptions two models how can affect construction interpreta tion. The then specifically examines interrelate as item discrimination. Examinees Mexico, Saudi Arabia Japan were administered one forms a functional (Form A n = 430, k 94: Form B 400, 95). data analysed using results compared. indicate strong correlation, slope, infit outfit. These need to employ model when con ditions allow, take discrimination difficulty into account condi...