16–30 Months
MacArthur-Bates Communicative Development Inventories (CDI) Words and Sentences E-Forms
Communication and Language

For use with the MacArthur-Bates Communicative Development Inventories (CDIs), the Words and Sentences E-Form, available for digital download, helps professionals tap into families'  knowledge about their children's language and communication skills between the ages of 16 and 30 months.

57044 978-1-68125-704-4
Available Stock

The Words and Sentences E-Form, part of the third edition of the MacArthur-Bates Communicative Development Inventories (CDIs), is a comprehensive instrument designed for use with ages 16 to 30 months. To complete the inventory, parents document the child’s production of hundreds of words, record the child’s use of early forms of grammar, and provide written examples of the child’s three longest utterances.

The form is a fillable PDF that can be emailed to families. It includes some totaling functionality to help reduce the amount of time needed to score the inventory. Customers will receive an email after purchase with directions on how to access and download the form. Adobe Acrobat is required for use.


The MacArthur-Bates Communicative Development Inventories (CDIs) are one of the most widely used and recommended measures of language and communication for young children.

Used in both research and clinical settings, these parent report instruments help SLPs and other professionals screen children, develop a prognosis for children with language delays, plan effective intervention, monitor progress, and meet mandates for including parent input in child evaluation.

The third edition of the CDIs includes updated norms, additional tools, and more administration formats and helpful resources. Learn more about the MacArthur-Bates CDIs, Third Edition here.



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