8–18 Months
MacArthur-Bates Communicative Development Inventories (CDI) Words and Gestures Forms, Third Edition
Communication and Language

For use with the MacArthur-Bates Communicative Development Inventories (CDIs), these Words and Gestures Forms, sold in a pack of 25 paper forms, help professionals tap into parents’ knowledge about their children’s language and communication skills between the ages of 8 and 18 months.

57013 978-1-68125-701-3
2023 12
Available Stock

The Words and Gestures Form, part of the third edition of the MacArthur-Bates Communicative Development Inventories (CDIs), is a comprehensive instrument designed for use with ages 8 to 18 months. To complete the inventory, parents document the child’s understanding and production of hundreds of early vocabulary items. Then, parents record communicative and symbolic gestures the child has tried or completed. It is available in a pack of 25 paper forms.


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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