E-ISSN : 2733-4538
This study purported to develop norms for the Modified Trail Making Test(TMT) in the elderly Korean population. In order to develop valid norms, we examined the correlations of demographic variables with the test performance. We also investigated the construct validity of the Modified TMT. Triangles and squares were substituted for letters, to minimize the effects of literacy. Normative sample consisted of one hundred and twenty elderly volunteers whose age were between 55 and 84 living in Seoul, Kyungki-do, and Kwangju. Age and education proved to be significant factors influencing the response time of the Modified TMT, but not the number of errors. Gender and literacy didn't affect the performance on the Modified TMT. Correlational analyses of the Modified TMT and the subtests of K-DRS and CDST supported that Modified TMT is valid as a test for visual attention, cognitive flexibility, and general cognitive measure. Analyses on the response time and the error rates suggest that the Modified TMT-C demand more cognitive effort and is more difficult than the A and the B test. Normative data of the time and error rates, which were stratified by age and education, were presented. This study provides basic data necessary for further research on and clinical assessment of the aged Korean population.