I created a very special crossword puzzle. In order to take it you must register by giving a first and last name but you don’t have to use your real name or even the pseudo-name we know you by, but whatever name you choose, please write it down somewhere safe so you’ll remember it for next time I post one of these tests which will likely be very soon.

By using the same name every time you take a test, not only can you build a diagnostically informative cognitive profile, but you allow me to calculate how well my tests intercorrelate.

So what makes this crossword puzzle so special? I created it by selecting 17 words completely randomly from the English language. The crossword clue for each word was simply each word’s definition from the most authoritative dictionary.

Because the words were completely chosen at random and thus are a representative sample of all English words, a perfect score means you can retrieve close to 100% of the English language from seeing just the definitions and a 0 score means you can retrieve close to zero percent.

Further, because this test has a true zero point, someone who scores 4 out of 17 has arguably twice the receptive vocabulary as someone who scored 2 who has twice the receptive vocabulary as someone who scored 1. This is rare chance to study the true distribution of cognition on an absolute scale.