The navicular drop test was used as an indicator of foot pronation. It is defined as the distance between the original height of the navicular from the floor, with the foot on the floor in sitting in the subtalar neutral position, and the final weight-bearing position of the navicular in relaxed stance. This measurement is thought to represent the sagittal plane displacement of the navicular bone from a neutral position to a relaxed standing position. The purpose of this study was to test intra-rater reliability of a method for measuring the navicular drop. Fourteen healthy subjects, mean age 34.5±5.68 years, participated in the reliability study. Foot pronation was assessed using the navicular drop test. Measurements of the navicular drop were performed three times on each foot, one day apart and were averaged for statistical analysis. Statistical analysis was performed using SPSS (SPSS 10, for Windows). Intraclass correlation coefficients were 0.78 and 0.88 for the dominant and non- dominant leg respectively. The results demonstrated moderate to good intra-rater reliability for use of the navicular drop test for measuring foot pronation in clinical settings.Navicular drop test je upotrebljen kao indikator pronacije noge. Definira se kao razlika između visine navikularke od poda, u sjedećem položaju kad je noga na podlozi u subtalarnoj neutralnoj poziciji, i konačnom opterećenju navikularke u relaksiranom položaju. Mjerenje predstavlja pomak sagitalne ravnine navikularne kosti iz neutralne pozicije u stojeću neutralnu poziciju. Svrha studije je testiranje pouzdanosti intra-rater testa za mjerenje navikularnog pada. U studiji je sudjelovalo četrnaest zdravih osoba, prosječne starosti 34,5±5,68 godina. Pronacija noge je ocjenjena upotrebom navicular drop testa. Mjerenja navikularnog pada su izvršena tri puta na svakoj nozi, svaki drugi dan. Rezultati su bili statističko analizirani, upotrebom SPSS (SPSS 10, za Windowse).Koeficijent korelacije između različitih parametara je bio 0,78 i 0,88 za dominantnu odnosnu nedominantnu nogu. Rezultati pokazuju umjerenu do dobru intra-rater pouzdanost za upotrebu navikularnog drop testa za mjerenje pronacije noge u kliničkim okvirima
