MacArthur-Bates Communicative Development Inventories (CDI) CDI-III Forms: 31-37 Months

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CDI-III, part of the third edition of the MacArthur-Bates Communicative Development Inventories (CDIs), is a short, 2-page tool that measures language and communication skills for children between the ages of 30 to 37 months. Parents complete this quick instrument to document a child's expressive vocabulary and grammar. It is available in a pack of 25 paper forms on a tablet.

For use with the MacArthur-Bates Communicative Development Inventories (CDIs), these CDI-III Forms, sold on a tablet of 25 paper forms, offer a quick measure of vocabulary and grammar skills for children between the ages of 30 to 37 months.

WHAT'S NEW

The third edition of the CDIs includes updated norms, additional tools, and more administration formats and helpful resources. Here's a look at what's new:

• Expanded and more representative norms―more than 4,000 new children have been added to the norming dataset for the CDI: Words and Gestures and CDI: Words and Sentences. Norming tables have been statistically adjusted to reflect key U.S. demographic indicators.
• More options for electronic administration of the CDIs, including fillable PDFs and a new web-based administration platform, Web-CDI
• New picture-based instructions with easy-to-understand illustrations and examples
• More extensive administration and scoring guidelines
• More on using the CDIs with bilingual and multilingual children
• An expanded chapter on the CDI-III
• Detailed guidelines about choosing the most appropriate CDI forms when several are potentially useful
• Expanded guidelines on the use of CDI short forms, including new statistically-adjusted norms and information on reliability and validity
• More CDI resources available online, including Wordbank, an open repository of CDI data in 38 languages representing more than 84,000 children
• A rapid, valid Computerized Adaptive scale for expressive vocabulary, now available through Web-CDI
• A helpful list of frequently asked questions

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