MacArthur Bates Word Inventory - 28.5 Months

For Lily’s latest scores on the MacArthur Bates Communicative Development Inventory (MBCDI), she was credited with 603 words. 

For girls at 28 months, this word score places her between the 75th and 80th percentile. These are normally hearing kids/girls - Whooo Hoo!!!   The MBCDI ends at 30 months of age – and they see ceiling effects (kids are learning lots of words that are not represented on the scale). 

While this is not a test of overall language proficiency, speech or listening, it is a very interesting measure in language/vocabulary growth.