As one of the books in the Postgraduate Series of Teaching Chinese as a Second Language / International Chinese Education, this book mainly discusses five problems regarding language testing and psychological measurement, namely language competence, construct validity, constancy of IRT (Item Response Theory), origin of the Rasch model, and joint measurement. Besides, it also touches upon computational linguistics and ERP (event-related potential). 

Zhang Kai is a BLCU professor devoted to language testing studies, who has published several books on language testing, including Study on Criterion-Referenced Measurement and Selected Works of Zhang Kai.