Pic2PLex: A Test for Assessing Free Productive Vocabulary

We present Pic2PLex, a new test for assessing free productive vocabulary, the lexicon people use writing and speaking. Unlike existing vocabulary tests, Pic2PLex uses images as stimuli to let test-takers say something. A item comprises set of six different with common theme two answer sections: tenword section description section. Given image set, are instructed write ten words that come their minds brief in corresponding sections. propose an algorithm generate sets items from large dataset. The was designed simultaneously achieve conflicting goals: making share same themes among across diverse much possible. conducted experiments Japanese language learners native speakers collect responses using tests comparison. Quantitative qualitative investigation revealed (i) elicits based on lexical knowledge would have acquired, (ii) elicited can be used assessments measure how test-taker has.