تعيين پايايي و روايي آزمون رشد حركتي درشت در كودكان 3 تا 11 ساله شهر تهران

Determining Reliability and Validity of Test of Gross Motor Development (Ulrich, 2000) in 3-11 Aged Children of Tehran City

The purpose of this study was to determine construct validity and three reliability aspects of Test of Gross Motor Development (TGMD-2; Ulrich, 2000) in Tehranian children aged 3-11. TGMD-2 which includes two subtests (locomotor and object control), is designed to assess movement pattern development of 12 fundamental skills. The total sample consisted of 1438 children that were equally divided among 8 age groups and between 2 genders. Internal consistency reliability for locomotor and object control score and also for total composite score averaged 0.78, 0.74 and 0.80, respectively. Internal consistency reliability was high for females and males, too. Test-retest reliability ranged from 0.65 to 0.81, and Interarater reliability was above 0.95. To investigate construct validity, Ulrichʹs (2000) two-factor model postulated and this hypothesis was tested through confirmatory factor analysis. According to the model, six variables or skills measuring childʹs ability for moving into space, loaded on one factor (locomotor), while the other six variables measuring ability for controlling and manipulating objects, loaded on the other factor (object control).According to the resulting findings, two-factor structure of TGMD-2 and also proper assignment of skills to locomotor and object control factors were supported for our population, too. Additionally the correlation coefficients between age and subtestsʹ score provided support for another aspect of construct validity, i.e., developmental nature of TGMD-2; the resulting coefficients indicated that TGMD-2 is capable of differentiation between ages. In conclusion, this study indicated that TGMD-2 can be used with confidence to assess gross motor development of the studied population.