A comparison study was conducted in which 372 subjects, ages 3 through 10 years, were tested by using the Southern California Postrotary Nystagmus Test. The purpose of the study was to determine the generalizability of the original normative data for the test by using a larger sample and an expanded age range of subjects. A comparison of these data from the comparison study with the original normative data showed close agreement. No significant differences in vestibular responsivity were obtained for age, sex, or interaction. Test-retest reliability was comparable to that found for the original normative group. The results of the comparison study were consistent with the original normative data and suggest that they may be applied to subjects from 3 through 10 years of age.

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