... Demonstration Sessions,pages 11 7 12 0, Ann Arbor, June 2005.c2005 Association for Computational LinguisticsOrganizing English Reading Materials for Vocabulary Learning Masao Utiyama, Midori ... Vtodo, Vdone)= αg(d|Vtodo) + (1 − α)g(d|Vdone), (1) until C covers all of V . We then define g(·) asg(d|Vx)=k 1 + 1 k 1 ( (1 − b) + b|W (d)|E(|W (·)|)) + 1 |W (d) ∩ Vx|, (2)where W(d) ... Table) was 18 .4 and that oftypes (“num. of common types”) was 12 .4. About 12 .3%(= 18 .4 15 0× 10 0) of the tokens in each articlewere covered by the vocabulary. Each article in the 10 On our web...