Related Experiment Video
Updated: Jul 14, 2026
Quantified Assessment of Infant's Gross Motor Abilities Using a Multisensor Wearable
Published on: May 17, 2024
Concurrent validity of the Early Intervention Developmental Profile and the Peabody Developmental Motor Scale-2
Joyce R Maring1, Leonard Elbaum
1Program in Physical Therapy, George Washington University, Washington, DC 20037, USA. hspjxm@gwumc.edu
Purpose:
The purpose of this study was to determine the concurrent validity of the Early Intervention Developmental Profile (EIDP) and the Peabody Developmental Motor Scale-2 (PDMS-2) in examining gross motor delay.
Methods:
Thirty children with a variety of developmental delays attending an early intervention program were administered both the PDMS-2 and the EIDP as part of their developmental evaluations.
Results:
The PDMS-2 and EIDP were strongly correlated (r = 0.91, p < 0.01) but the mean age equivalent scores were significantly different. Age equivalent scores were on average 26% higher on the EIDP.
Conclusions:
Differences in age equivalent scores between tests may affect a child's eligibility for services in some states. This study supports the use of norm-based tests when determining a percentage of delay relative to the norm. Developmental tests should not be the sole determinant of the clinical decision making processes.
