Published work on vocabulary assessment has grown substantially in the last 10 years, but it is still somewhat outside the mainstream of the field. There has been a recent call for those developing vocabulary tests to apply professional standards to their work, especially in validating their instruments for specified purposes before releasing them…

The main purpose of this study is to investigate guessing in the Yes/No (YN) format vocabulary test. One-hundred-and-five university students took a YN test, a translation task and a multiple-choice vocabulary size test (MC VST). With matched lexical properties between the real words and the pseudowords, pseudowords could index guessing in the YN…