It is easy, in principle, to use a vocabulary list as part of a computer-based readability measure. The list is organised as a look-up table. The percentage of listed words in a passage gives the data for the formula, and the user is presented with a grade level.
ɪ t WORD_BOUNDARY ɪ z WORD_BOUNDARY iː z i WORD_BOUNDARY ɪ n WORD_BOUNDARY p ɹ ɪ n s ɪ p ə l WORD_BOUNDARY t ə WORD_BOUNDARY j uː z WORD_BOUNDARY ʌ WORD_BOUNDARY v oʊ k æ b j ʊ l ɛ ɹ i WORD_BOUNDARY l ɪ s t WORD_BOUNDARY æ z WORD_BOUNDARY p ɑ ɹ t WORD_BOUNDARY ə v ə WORD_BOUNDARY k ə m p j uː t ə ɹ b eɪ s t WORD_BOUNDARY ɹ iː d ə b ɪ l ɪ t i WORD_BOUNDARY m ɛ ʒ ə ɹ WORD_BOUNDARY ð ə WORD_BOUNDARY l ɪ s t WORD_BOUNDARY ɪ z WORD_BOUNDARY ɔ ɹ ɡ ʌ n aɪ z d WORD_BOUNDARY æ z WORD_BOUNDARY ʌ WORD_BOUNDARY l ʊ k ʌ p WORD_BOUNDARY t eɪ b ə l WORD_BOUNDARY ð ə WORD_BOUNDARY p ə ɹ s ɛ n t ɪ d̠ʒ WORD_BOUNDARY ʌ v WORD_BOUNDARY l ɪ s t ɪ d WORD_BOUNDARY w ɜː d z WORD_BOUNDARY ɪ n WORD_BOUNDARY ʌ WORD_BOUNDARY p æ s ɪ d̠ʒ WORD_BOUNDARY ɡ ɪ v z WORD_BOUNDARY ð ə WORD_BOUNDARY d eɪ t ə WORD_BOUNDARY f ə ɹ ð ə WORD_BOUNDARY f ɔ ɹ m j ʊ l ə WORD_BOUNDARY æ n d WORD_BOUNDARY ð ə WORD_BOUNDARY j uː z ə ɹ ɹ WORD_BOUNDARY ɪ z WORD_BOUNDARY p ɹ ɪ z ɛ n t ɪ d WORD_BOUNDARY w ɪ ð WORD_BOUNDARY ʌ WORD_BOUNDARY ɡ ɹ eɪ d WORD_BOUNDARY l ɛ v ə l WORD_BOUNDARY