In this study, the differences in Clock Drawing Test(CDT) scores among healthy
elderlies, schizophrenics, and demented elderlies groups were investigated, and the
characteristics of their drawings were compared. The subjects of this study were 68
healthy elderlies, 72 schizophrenics patients, and 73 demented elderlies in Daegu and
Gyeongbuk area. They took CDT. The scores of the test were obtained using the
10-score system suggested in Rouleau, Salmon & Butters(1996). Covariate analyses
and cross analyses were conducted. Outcomes of this study are as follows: First, In
the clock plate and number domains, the demented elderlies group showed a lower
score than the healthy elderlies and schizophrenics groups; in the hand domain, the
schizophrenics and demented elderlies groups showed lower scores than the healthy
elderlies group; and in terms of the CDT total score, the healthy elderlies group
showed the highest level followed by the schizophrenics and demented elderlies
groups. Second, in terms of the five error types except preservation, such as clock
size, level of drawing difficulty, stimulation constraint, concept defect, and number
arrangement error, significant differences were observed according to the symptoms.
In summary, the schizophrenics group showed a lower level of clock drawing
performance than the healthy elderlies group, and the demented elderlies group than
the schizophrenics patient group. The differences in the CDT score and error type
among the healthy elderlies, schizophrenics, and demented elderlies groups, which
were obtained from this study, may help enhance their clinical applicability.