The word frequency program has been updated and now it includes word frequency in Spanish as well as in English.

Month by month norms for all of the words included in the English and Spanish language CDI infant and toddler forms may be accessed in the following database:

The Lex2005 Database



Dale, P.S., & Fenson, L. (1996). Lexical development norms for young children. Behavior Research Methods, Instruments, & Computers, 28, 125-127.



Last Updated June 2013


copyright 2003 CDI Advisory Board