This study proposed an innovative automated approach to differentiation of the vocabulary proficiency of Chinese speakers. A robust K-means algorithm was designed to compare the oral proficiency between L1 and L2 Chinese speakers regarding lexical richness and how relatively effective the various lexical measures were in performing the…

Educators, especially test creators, are concerned with the construct validity of their tests. Blame has generally been attached to test-wiseness strategies as one source of error in measurement. There is little evidence of any relation between test-taking strategies in general and test validity; thus, it is not known how strategies can affect…

This study aimed to examine the effect of test format on test performance by comparing Multiple Choice (MC) and Constructed Response (CR) vocabulary tests in an EFL setting. Also, this paper investigated the function of gender in MC and CR vocabulary measures. To this end, five 20-item stem-equivalent vocabulary tests (CR, and 3-, 4-, 5-, and…

The current study sought to examine the validity of a General English Achievement Test (GEAT), administered to university students in the fall semester of 2018-2019 academic year, by hybridizing differential information (DIF) and differential distractor function (DDF) analytical models. Using a purposive sampling method, from the target population…

Background: The Common European Framework of Reference (CEFR) (Council of Europe 2001) has, over the past decade, come to be widely used as a reference tool for teaching, learning and assessment (Alderson 2002; North 2014). The focus of the current study is on scaling the China Standards of English (CSE) vocabulary descriptors for College English…