Computerized Assessment of Neurocognitive function for Traumatic Brain Injury Patients / 신경정신의학

Irrespective of focal lesion in brain imaging study, the deficits in cognitive function have been reported in mild traumatic brain injury patients. Therefore, they have been asked sensitive and objective assessment tools measuring cognitive deficits. In this study, traumatic brain injury patients were classified into lesion group and non-lesion group by presence of focal lesion in brain imaging study. At the same time, Results of Bender-Gestalt test, Standard Progressive Matrices, Cognitrone, and Signal Detection were analyzed among the groups. We assessed usefulness of Standard Progressive Matrices as assessment tool of intelligence in traumatic brain injury patients by correlation coefficients between KWIS and Standard Progressive Matrices intelligence quotients. 1) Most lesion group showed severe deficits in cognitive function, and most non-lesion group showed severe somatic symptoms. 2) The lesion group showed higher Bender-Gestalt test total error score than non-lesion group. 3) There was no difference in HWIS intelligence quotients between lesion and non-lesion group. 4) The lesion group showed lower performance than normal control and non-lesion group as increasing complexity of Standard Progressive Matrices subset. 5) The lesion group showed poor performance than normal control group in Cognitrone. 6) There were higher correlation coefficients than normal control group between Standard Progressive Matrices intelligence quotients and KWIS intelligence quotients in traumatic brain injury patients. According to the above results, lesion group showed deficits in space-construction ability, fine-motor coordination ability, form-memory ability, and delayed response-time. Although there are no statistical significance, comparing with normal control group, non-lesion group showed different response-trend in Cognitrone. Considering somatic symptoms in most non-lesion group and contribution of psychological factors in maintenance of symptoms in mild traumatic brain injury patients, the differences in Cognitrone must be interpreted carefully. These result suggest than Standard Progressive Matrices can be a useful tool for assessment of intelligence in traumatic brain injury patients who showed deficits in cognitive function.

A Study on Discriminant Function of KWIS Subscales in Schizophrenic Patients / 영남의대학술지

The purpose of this article was to determine the discriminant function analysis of the Korean Wechsler Intelligence Scale (KWIS) for 110 normal controls and 98 schizophrenics. Of special interest was to verify the clinical discriminant power of two subtests of the KWIS (Vocabulary and Digit Symbols) and Zung's Self-rating Anxiety Scale (SAS). Four major hypotheses were postulated. The normal control group would show higher scores then the schizophrenics; mean scores on both Vocabulary and Digit Symbol. The mean difference in Digit Symbol between the two groups would be greater than that in the Vocabulary. There would be no significant relation among Digit Symbol, Vocabulary, and Anxiety. The most powerful discriminant power would be expected from subtest of Digit Symbol. The mean discriminant scores were 1.34425 for the control subjects, 1.34425 for the schizophrenics. The correctly discriminated percentage was 89.1% for the control subjects, 90.8% for the schizophrenics. From the findings it was concluded that both Digit Symbol and Vocabulary scales had strong diagnostic value but the former was more powerful than the latter. However, the Anxiety scales had less diagnostic value.