David Cooke and colleagues have published a series of item response theory (IRT) studies investigating the equivalence of the Psychopathy Checklist-Revised (PCL-R) for European versus North American (NA) male criminal offenders. They have consistently concluded that PCL-R scores are not equivalent, with European offenders receiving scores up to…

Research with ESL students studying at North American universities has indicated that Chinese students have difficulties in understanding academic lectures, taking notes, writing assignments, and giving presentations although they have obtained high TOEFL scores. The study investigates their English academic listening challenges as reported by…