DETERMINATION OF NORMATIVE VALUES OF THE DEVELOPMENTAL TEST OF VISUAL PERCEPTION (DTVP-2) IN THAI CHILDREN

This study aims to determine the normative values of the Developmental Test of Visual Perception (DTVP-2) in Thai Children. The data was obtained from a sample of 1,120 children, and scoring followed. The DTVP-2 (Thai version) had been examined for validity and reliability. These studies showed that the DTVP-2 (Thai version) has acceptable content validity. The Index of Conjugate (IOC) was established by three reviewers: the IOC is 0.6 in sub-tests 1, 4, 5, 6, and 8;and the IOC is 1 in sub-tests 2, 3, and 7.Byusing a test?retest method, it wasfound that this test has a degree of reliability that is almost perfect. The entire DTVP-2 test has an Intraclass Correlation Coefficiency(ICC) of 0.89, and the ICC sub-tests range from 0.81 - 0.96.