Validity of the TIMPSI for estimating concurrent performance on the test of infant motor performance.
OBJECTIVE
The TIMPSI, a short version of the Test of Infant Motor Performance (TIMP), is used for screening. The project was designed to compare concurrent TIMPSI scores with those on the TIMP and recommend cutscores for clinical decision making.


METHODS
Infants (n = 990) were recruited reflecting the race/ethnicity of US infants with low birth weight. From 67 to 97 infants were tested in 2-week age groups ranging from 34 to 35 weeks postmenstrual age through 16 to 17 weeks post-term. Rasch analysis of raw scores was used. TIMPSI cutscores ranging from the mean to -1.00 standard deviation (SD) were compared with performance above/below -0.5 SD on the TIMP to assess accuracy of classification.


RESULTS
The TIMPSI was a valid screening instrument when compared with concurrent performance on the TIMP.


CONCLUSIONS
A cutscore of -0.25 SD appears useful in predicting the best combination of false negatives (5.8%) and false positives (12.5%) with overall accuracy of classification of 81.7%.
Campbell
Suzann K
SK
Department of Physical Therapy, College of Applied Health Sciences and College of Education, University of Illinois at Chicago, Chicago, Illinois 60612, USA. skc@uic.edu
Swanlund
Andrew
A
Smith
Everett
E
Liao
Pai-Jun
PJ
Zawacki
Laura
L
D002658:Developmental Disabilities / Q000145:classification / Q000175:diagnosis*; D006801:Humans; D007223:Infant; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D008403:Mass Screening; D019957:Motor Skills Disorders / Q000145:classification / Q000175:diagnosis*; D009483:Neuropsychological Tests; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012306:Risk