Article/Report  |   December 2007
Construct Validity of the MCDI-I Receptive Vocabulary Scale Can Be Improved: Differential Item Functioning Between Toddlers With Autism Spectrum Disorders and Typically Developing Infants
Author Affiliations & Notes
  • Cornelia Bruckner
    Vanderbilt University, Nashville, Tennessee
  • Paul Yoder
    Vanderbilt University, Nashville, Tennessee
  • Wendy Stone
    Vanderbilt University, Nashville, Tennessee
  • Megan Saylor
    Vanderbilt University, Nashville, Tennessee
  • Contact author: Cornelia Bruckner, who is now with the Napa County Office of Education, 311 Professional Center Drive, Ronnent Park, CA 94928. E-mail: cornelia.bruckner@gmail.com.
Development / Special Populations / Autism Spectrum / Research Issues, Methods & Evidence-Based Practice / Language
Article/Report   |   December 2007
Construct Validity of the MCDI-I Receptive Vocabulary Scale Can Be Improved: Differential Item Functioning Between Toddlers With Autism Spectrum Disorders and Typically Developing Infants
Journal of Speech, Language, and Hearing Research December 2007, Vol.50, 1631-1638. doi:10.1044/1092-4388(2007/110)
History: Accepted 03 Mar 2007 , Received 06 Sep 2006 , Revised 12 Jan 2007
Journal of Speech, Language, and Hearing Research December 2007, Vol.50, 1631-1638. doi:10.1044/1092-4388(2007/110)
History: Accepted 03 Mar 2007 , Received 06 Sep 2006 , Revised 12 Jan 2007

Purpose: To evaluate whether the validity of the Receptive Vocabulary scale of the MacArthur Communicative Development Inventory for Infants (MCDI-I; L. Fenson et al., 1991), a parent-report measure of early vocabulary, could be improved for children with autism spectrum disorders (ASD) by removing items that are biased.

Method: Logistic regression was used to identify biased items. Items are considered biased if characteristics other than those being measured by the instrument change the probability that a person will get an item correct. Participants in the current study included 272 typically developing infants younger than 18 months of age and 209 toddlers with ASD older than 18 months of age. The age difference between the 2 groups is a result of matching on total size of the receptive vocabulary.

Results: Twenty-five items were identified as showing large bias.

Conclusion: Deletion of these items from the test should increase the degree to which the authors are measuring the size of the respondent’s mental lexicon with the total score from the MCDI-I.

Order a Subscription
Pay Per View
Entire Journal of Speech, Language, and Hearing Research content & archive
24-hour access
This Article
24-hour access

Related Articles

Change in Pragmatic Language in Infant-Toddlers With Autism Spectrum Disorder: A Retrospective Study
SIG 1 Perspectives on Language Learning and Education March 2011, Vol.18, 32-36. doi:10.1044/lle18.1.32
Neighborhood Density and Word Frequency Predict Vocabulary Size in Toddlers
Journal of Speech, Language, and Hearing Research June 2010, Vol.53, 670-683. doi:10.1044/1092-4388(2009/08-0254)
Lexical Characteristics of Expressive Vocabulary in Toddlers with Autism Spectrum Disorder
Journal of Speech, Language, and Hearing Research February 2014, Vol., No Pagination Specified. doi:10.1044/2014_JSLHR-L-13-0006
Longitudinal Analysis of Receptive Vocabulary Growth in Young Spanish English–Speaking Children From Migrant Families
Language, Speech, and Hearing Services in Schools January 2014, Vol.45, 40-51. doi:10.1044/2013_LSHSS-12-0104
Statistical Learning in Emerging Lexicons: The Case of Danish
Journal of Speech, Language, and Hearing Research October 2012, Vol.55, 1265-1273. doi:10.1044/1092-4388(2012/10-0291)