The Known Chinese Words Test has been running for a month now. During that time I’ve collected data from 170 trials, from learners with a wide range of levels. The results are very encouraging, so that I can give more details about what I have found. What I have been working on is a mathematical model for word knowledge, which can describe the probability for a particular person to know any word, with just a few variables involved. The results from the collected trials validates that hypothetical model, and I’m elated.