Development of a functional movement scale for infants.
The increasing survival rate of infants with a complicated birth and perinatal history generated the need for a test of functional motor performance with the capability of identifying children under four months of age with delayed development which could be addressed with physical therapy. This paper describes a Rasch analysis of the psychometric qualities of the Test of Infant Motor Performance (TIMP) for the purpose of reducing the length of the test while maintaining its precision as a measurement device. Following analysis of fit statistics, item-to-total correlations, redundancy of item difficulty measures, and consideration of clinically-relevant features of test items from analysis of 1732 tests, the TIMP was reduced from 59 to 42 items forming a functional motor scale for prematurely born infants. The resulting person separation index was 4.85 and the item separation index was 23.79.
Campbell
Suzann K
SK
Department of Physical Therapy, University of Illinois at Chicago, 1919 W. Taylor Street M/C 898, Chicago, IL 60612-7251, USA. skc@uic.edu
Wright
Benjamin D
BD
Linacre
J Michael
JM
D002658:Developmental Disabilities / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000175:diagnosis*; D008137:Longitudinal Studies; D008297:Male; D015233:Models, Statistical; D009043:Motor Activity; D009048:Motor Skills; D009460:Neurologic Examination / Q000706:statistics & numerical data*; D015203:Reproducibility of Results