Abstract
Objectives
To (1) develop a computerized adaptive test for gross motor skills (GM-CAT) as a diagnostic
test and an outcome measure, using the gross motor skills subscale of the Comprehensive
Developmental Inventory for Infants and Toddlers (CDIIT-GM) as the candidate item
bank; and (2) examine the psychometric properties and the efficiency of the GM-CAT.
Design
Retrospective study.
Setting
A developmental center of a medical center.
Participants
Children with and without developmental delay (N=1738).
Interventions
Not applicable.
Main Outcome Measures
The CDIIT-GM contains 56 universal items on gross motor skills assessing children's
antigravity control, locomotion, and body movement coordination.
Results
The item bank of the GM-CAT had 44 items that met the dichotomous Rasch model's assumptions.
High Rasch person reliabilities were found for each estimated gross motor skill for
the GM-CAT (Rasch person reliabilities =.940-.995, SE=.68-2.43). For children aged
6 to 71 months, the GM-CAT had good concurrent validity (r values =.97-.98), adequate to excellent diagnostic accuracy (area under receiver
operating characteristics curve =.80-.98), and moderate to large responsiveness (effect
size =.65-5.82). The averages of items administered for the GM-CAT were 7 to 11, depending
on the age group.
Conclusions
The results of this study support the use of the GM-CAT as a diagnostic and outcome
measure to estimate children's gross motor skills in both research and clinical settings.
Keywords
List of abbreviations:
AUC (area under the receiver operating characteristic curve), CAT (computerized adaptive test), CDIIT (Comprehensive Developmental Inventory for Infants and Toddlers), CDIIT-GM (gross motor skills subscale of the CDIIT), DIF (differential item functioning), DQ (developmental quotient), GM-CAT (CAT for gross motor skills), MnSq (mean square)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: August 30, 2017
Footnotes
Supported by Chi-Mei Hospital and National Cheng Kung University Hospital (grant no. CMNCKU10421).
Disclosures: none.
Identification
Copyright
© 2017 by the American Congress of Rehabilitation Medicine
