Abstract
A pilot study was conducted to compare performances of 3-year-old children with 5- and 6-year-olds on the standardized Southern California Postrotary Nystagmus Test (SCPNT) and a revised version of this instrument. Standard test procedures were modified to correct for the variable of head and trunk control in 3-year-olds. The subjects were 16 3-year-olds and six 5- and 6-year-olds in metropolitan Cincinnati, Ohio. Subjects were administered the standardized and revised SCPNT in counterbalanced order approximately 1 hour apart. Data were analyzed using the Pearson product-moment correlation The correlation coefficient for total scores on the two tests for 5- and 6-year-olds was .88. This coefficient was found to be significant (p< 05), providing evidence for validity of the revised SCPNT. The correlation coefficient for the 3-year-olds was .42, which was not found to be significant (p< 05). Results suggested that for 3-year-olds, different neural processes were being tapped by the two tests. Recommendations for further research are discussed.
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