C-Test construct validity: Evidence from nonparametric item response theory by Roya Shoahosseini, Purya Baghaei, Hossein Khodabakhshzadeh and Hamid Ashraf
C-Test is a gap-filling test designed to measure first and second language proficiency. Over the past four decades, researchers have shown the fit of C-Test data to parametric item response theory (IRT) models...