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Test of infant motor performance: Cross-cultural adaptation, validity and reliability in Persian infants
Aida Ravarian1, Nahid Rahmani2, Farin Soleimani3
1Pediatric Neurorehabilitation Research Center, Department of Occupational Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
Insights
The Persian version of the Test of Infant Motor Performance (TIMP) demonstrates high validity and reliability for assessing infant motor skills. This tool effectively identifies infants at risk for developmental delays, aiding early diagnosis.
Area of Science:
- Pediatrics
- Developmental Pediatrics
- Rehabilitation Medicine
Background:
- The Test of Infant Motor Performance (TIMP) is crucial for early diagnosis of developmental delays in infants.
- A reliable Persian translation of the TIMP is necessary for its use in Iran.
- Cross-cultural adaptation is essential for accurate assessment in diverse populations.
Purpose of the Study:
- To evaluate the validity and reliability of the Persian version of the TIMP.
- To perform cross-cultural adaptation of the TIMP for the Persian language.
- To establish the psychometric properties of the Persian TIMP.
Main Methods:
- Translation and cross-cultural adaptation by 22 experts.
- Testing of 170 premature infants (postmenstrual age 34-42 weeks).
- Evaluation of inter-rater, intra-rater, test-retest reliability, and discriminative validity.
Main Results:
- High content and face validity confirmed by expert panels.
- Excellent inter-rater (Kappa=0.93) and intra-rater (ICC=0.98) reliability.
- High test-retest reliability (ICC=0.98) and internal consistency (α=0.82).
- Significant discriminative validity for low birth weight and small-for-gestational-age infants.
Conclusions:
- The Persian TIMP is a valid and reliable tool for assessing infant motor performance.
- The test effectively differentiates infants at risk of motor delay.
- This adapted tool supports early detection and intervention for developmental delays in Persian-speaking infants.
Background:
The Test of Infant Motor Performance (TIMP) is an appropriate tool used to measure infant motor performance in many countries and due to the importance of the TIMP in the early diagnosis of infants with developmental delay, the production of a reliable translation of the TIMP in Iran is necessary.
Aims:
This study was designed to evaluate the validity and reliability of the Persian version of the TIMP and cross-cultural adaptation of the TIMP to Persian.
Method:
Twenty- two experts were involved in translation, cross-cultural adaptation, validity and reliability. 170 Persian premature infants with post menstrual age (PMA) 34-42 weeks were tested to evaluate inter-rater and intra-rater reliability, test-retest and discriminative validity of the Persian version of the TIMP.
Results:
The content validity and face validity of the items of the Persian version of the TIMP were confirmed by a 10-expert panel and 10 therapists. High intra- and inter-rater reliability (ICC = 0.98, Kappa = 0.93), test-retest reliability (ICC = 0.98) and internal consistency (α = 0.82) were detected for the Persian version of the TIMP. Discriminative validity confirmed that the TIMP could distinguish groups of infants born with a low birth weight (p ˂ 0.001) and infants born small for gestational age (p = 0.002).
Conclusions:
High validity and reliability are reported for the Persian version of the TIMP and this test was demonstrated to be differentiate among groups of infants who are at risk of motor delay.
