As to the assessment of productive vocabulary, the existing productive version of the academic section of the
Vocabulary Levels Test is based on the University Levels Test and contains only 18 items. Therefore, it is
necessary to design a new productive vocabulary test that is based on the Academic Word List and contains 30
items. In this way, results from receptive and productive vocabulary size tests can be comparable and the
reliability can be increased greatly. In light of this, a new productive vocabulary test was developed in this study.
It measured the same 30 words tested in a parallel version of the receptive vocabulary levels test that was used in
this study. And it followed the same format of the vocabulary size test of controlled productive ability developed. The purpose of providing the first few letters was to prevent learners from filling in the sentence with another word which would be both grammatically and semantically correct but which comes from a different frequency level.