Abstract:
VRA is a test that requires behavioral responses to sound stimuli. In general, the behavioral response is to turn the childs head to the sound source. This test is suitable for children aged 6-24 months. Sound stimuli used in the test are transmitted via the speakers or earphones encourage the child to respond by shifting his eyes or turning his head. When the child responds to the stimuli, he/she is rewarded with an interesting visual display, such as a lighted or animated toy. The conventional method of VRA by the use of narrow band noise (NBN) and warble tone for stimulation sometimes is not attractive and the response of the children occurs in a short time. In this study, the researcher created the new tool which includes audio and video signals together. Then the test results between the VRA using the new tool is compared to the VRA using traditional tool in 38 normal hearing children, aged between 6-24 months. Test results have shown that the response to sound stimuli by using the traditional and new tool were not significantly different at frequency 500 Hz, 1000 Hz and 2000 Hz at p-value < 0.05. However, at 4000 Hz there was significant difference at p-value < 0.05. When considering the number of head turns, the results showed that VRA with the new tool provided greater responses, than the VRA with the traditional tool. These findings suggested that this new tool can be used as an option for VRA testing instead of the traditional tool, moreover, this new tool also helps to attract the childs longer attention during the test.
Mahidol University. Mahidol University Library and Knowledge Center