• 한국과학교육학회지
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• 제22권1호
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• pp.12-21
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• 2002

이 연구의 목적은 정량적 현상제시와 정성적 현상제시를 하였을 때, 중학교 학생들의 갈등 정도를 알아보는 것이다. 연구 대상은 부산광역시 소재의 중학교 2학년 297명 을 대상으로 하였다. 검사 문항은 역학의 작용반작용 문항과 전기의 전구의 불의 밝기를 비교하는 문항을 사용하였고, 인지적 갈등을 측정하는 검사지는 권혁구(1999) 등이 개발한 도구를 사용하였다. 먼저, 정량적 현상제시 집단과 정성적 현상제시 집단의 인지갈등 점수를 비교해 보았다. 그리고 현상제시 후 자신의 선개념을 바꾼 학생들과 고수한 학생들의 갈등 점수를 비교해 보았다. 마지막으로, 선개념의 확신 정도와 갈등 정수와의 상관관계를 비교해보았다. 그 결과를 보면, 첫째, 선개념에서 오답을 선택한 학생들은 정성적 현상제시보다 정량적 현상제시에서 갈등 점수가 높게 나타났으며, 선개념에서 정답을 선택한 학생들은 정량적 현상제시보다 정성적 현상제시에서 갈등 점수가 높게 나타났다. 둘째, 자신의 선개념을 바꾼 학생들이 고수한 학생들에 비해 갈등 점수가 높게 나타났다. 마지막으로, 선개념의 확신정도와 갈등 점수와의 상관관계를 보면, 정량적 현상을 제시한 집단의 학생들 중 선개념에서 오답을 택한 학생들은 정적 상관을 보였고, 선개념에서 정답을 택한 학생들은 부적상관을 보였다. 정성적 집단은 뚜렷한 경향을 보이지 않았다.

• 한국안전학회지
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• 제21권5호
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• pp.103-111
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• 2006

The purpose of this study was to analyse the relationships between cognitive abilities and driving characteristics of elderly drivers. Driving characteristics of elderly and younger drivers who were driving a fixed base driving simulator vehicle were examined. Participants consisted of 12 drivers over age 65 (the 'older' group) and 12 drivers between the ages of 25 and 55 (the "younger" group). As indices of cognitive ability, critical flicker fusion frequency (CFF) tests and cognitive reaction tests were given before the driving task. CFF was also tested after the simulated driving task for both groups. Cognitive reaction tests, which were composed of speed estimation tests, multiple choice reaction tests and obstacle avoidance tests, were developed by the Korean Road Traffic Safety Authority in 2003. CFF values between the two groups exhibited significant differences both before and after the task, with a p-value less than 0.01 and a t-value of -3.01 before the test and a p-value less than 0.031 and a t-value of -2.35 after the test. Older drivers' CFF values were lower than those of the younger. However, there was no difference in older or younger driver CFF values before and after the task within the same group. Except for the multiple choice reaction test, there was no difference in cognitive reaction test results between the two groups. The elderly drivers made more errors though they did not differ from the younger drivers in reaction times. At the simulated driving task the reaction time of the elderly driver was longer than that of the younger; however, the driving speed of the elderly was lower and the number of collisions greater. There was a positive correlation (r=.496) between the number of errors in the multiple choice reaction test and the number of collisions in the driving task. Therefore, it was identified that critical attributes contributing to automobile crashes involving elderly drivers included cognitive difficulty in judging and responding to complex situations.

• 수산해양교육연구
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• 제22권1호
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• pp.99-112
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• 2010

This study was conducted to test the effect of Burns' cognitive-behavioral group counseling on depression and anxiety of industrial high school students. For this purpose, an experimental group and comparative group which was composed of 15 students respectively were assigned. The independent sample t-test between experimental group and comparative group about the degree of pre-test and after-test and the opposition sample t-test within each experimental group and comparative group were conducted. Analysis of Covariance was also applied. Results of the analyses showed that Burns' cognitive-behavioral group counseling program was effective in decreasing depression and anxiety. Implications of these results on student guidance and counseling were discussed. Suggestions for future research were presented and limitations were indicated.

• PNF and Movement
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• 제21권2호
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• pp.193-202
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• 2023

Purpose: We investigated the effects of transcranial stimulation and task-oriented training on upper extremity and cognitive function in chronic stroke patients. Methods: A total of 30 patients were randomly divided into transcranial stimulation and task-oriented training groups (TT) and task-oriented training groups (TO). The TT group performed 30 min 5 times a week for 4 weeks in task-oriented training combined with transcranial direct current stimulation. The TO group performed 30 min 5 times a week for 4 weeks in task-oriented training. To measure upper extremity function, the Jebsen-Taylor Hand Function Test, Manual Function Test, and Cognitive Function Test were performed using the Stroop Test and the Trail Making Test. Results: There was a significant difference (P < 0.05) before and after training in both groups, and the TT group showed significant improvement in both groups. Conclusion: In this study, we confirmed transcranial stimulation and task-oriented training in upper extremity function and cognitive function in patients with chronic strokes.

• 한국산학기술학회논문지
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• 제18권8호
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• pp.294-303
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• 2017

고령인구가 증가하면서 각종 노인성 만성질환 및 치매질환의 유병률 또한 빠르게 증가하고 있으며, 치매는 우리사회의 큰 관심 질환으로 대두되고 있다. 본 연구에서는 노인복지시설에서 거주하고 있는 인지장애 노인을 대상으로 비타민 보충제의 영양 강화요법이 경도인지기능 노인에게 미치는 효과를 보고자 하였다. 자료는 K지역에 위치한 노인복지시설 2개의 다른 건물에 입소한 노인 48명을 대상으로 각각 다른 건물에서 하나의 건물에서는 실험군 집단을 하나의 건물에서는 대조군 집단을 선정하였으며, 4,8,12주에 걸쳐 비타민 보충제를 복용한 후 호모시스테인 혈중농도와 인지기능을 평가하였다. 표집방법은 자료수집의 용이함을 고려하여 임의 표집방법을 이용분석을 위해 Chi-Square test, Fisher's Exact test와 independent t-test, Repeated Measure ANOVA, Contrast test, Repeated Measure ANCOVA, Wilks' lambda test를 실시하였으며, 인지기능 향상 효과에 대한 Contrast test를 실시한 결과, 12주차(p<.001) 에서 유의한 효과가 있는 것으로 나타났다. 경구 비타민제를 복용한 실험군의 인지기능 12주에서 대조군보다 각 시기별 차이를 분석한 결과 12주차(p<.05)에 실험군의 인지기능이 대조군보다 높게 나타났고, 호모시스테인 효과에 대한 12주(p<.01)에서 비타민제 복용이 효과가 유의하게 발생하여 대조군보다 호모시스테인이 감소한 것으로 나타났다. 결과적으로 경구비타민을 복용한 노인에게서 인지기능이 증가하였고, 호모시스테인 혈중농도가 주별 지속적으로 감소하였다. 이러한 결과는 치매로 갈 수 있는 경도인지장애 대상자들에게 비타민 보충제 복용은 상대적으로 비용이 저렴하고, 복용이 간편하여 추후 인지기능 저하 및 치매발생을 예방할 것으로 기대된다.

• 대한인간공학회지
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• 제29권6호
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• pp.907-914
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• 2010

Cognitive model, that is cognitive architecture, is the model expressed with computer program to show the process how human solve a certain problem and it is continuously under investigation through various fields of study such as cognitive engineering, computer engineering, and cognitive psychology. In addition, the much extensive applicability of cognitive model usually helps it to be used for quantitative prediction of human Behavior or Natural programming of human performance in many HCI areas including User Interface Usability, artificial intelligence, natural programming language and also Robot engineering. Meanwhile, when a system designed, an usability test about conceptual design of interface is needed and in this case, analysis evaluation using cognitive model like GOMS or ACT-R is much more effective than empirical evaluation which naturally needs products and subjects. In particular, if we consider the recent trend of very short-end term between a previous technology development and the next new one, it would take time and much efforts to choose subjects and train them in order to conduct usability test which is repeatedly followed in the process of a system development and this finally would bring delays of development of a new system. In this study, we predicted quantitatively the human behavior processes which contains cognitive processes for menu selection in touch screen interface through ACT-R, one of the common method of usability test. Throughout the study, it was shown that the result using cognitive model was equal with the result using existing empirical evaluation. And it is expected that cognitive model has a possibility not only to be used as an effective methodology for evaluation of HCI products or system but also to contribute the activation of HCI cognitive modeling in Korea.

• 한국치위생학회지
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• 제15권2호
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• pp.217-223
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• 2015

Objectives: The purpose of this study is to investigate cognitive function, performance of activities of daily living, and recognition on oral health with the cognitive function testto dementia or dementia-suspected patients in the outpatients. Methods: The subjects were 94 dementia or dementia-suspected patients visiting C University hospital for the dementia test. Study instruments included Korea Mini-Mental State Examination KMMS, The Bayer-Activities of Daily Living Scale; B-ADL, Seoul-Instrumental Activities of Daily Living; S-IADL, Global Deterioration Scale; GDS, Korean Dementia Screening Questionnaire; KDSQ, and underlying diseases. Results: Dementia or dementia-suspected patients were 42 by KMMSE test, 25 patients had impaired functioning of daily living by B-ADL test, 27 patients showed the presence of depression by GDS test, and 45 patients showed impaired functioning of daily living. There was a statistically significant difference in the subjective recognition on oral health conditions. There was a statistically significant difference in the subjective recognition on oral health conditions by ADL. There was a positive correlation between the cognitive function and ADL performance. Higher cognitive function is proportional to ADL performance. Conclusions: The cognitive function was closely associated with ADL and subjective oral health conditions.

• 대한물리의학회지
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• 제19권1호
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• pp.155-164
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• 2024

PURPOSE: The purpose of this study was to evaluate the effects of simultaneous application of gaze stabilization exercise and cognitive training on the balance and gait ability in subacute stroke patients. METHODS: Thirty-five patients diagnosed with stroke within 3-6 months were randomly assigned, and the experimental group (n = 18) to which both gaze stabilization exercise and cognitive training were applied and the control group (n = 17) to which only gaze stabilization exercise was applied were targeted. It was performed for 30 minutes at a time, three times a week, for a total of 4 weeks. Berg Balance Scale, Timed Up and Go test, 10Meter Walking Test, and Walking symmetry were evaluated. RESULTS: In the comparison of changes between Berg Balance Scale, Time Up and Go test, 10 Meter Walking Test, and Gait symmetry, both experimental and control groups showed significant differences before and after the intervention, and in the evaluation of Gait symmetry, significant differences between groups. CONCLUSION: As a result of this study, when gaze stabilization exercise and cognitive training were allied simultaneously, it was possible to improve the balance and gait ability of subacute stroke patients, and had a more significant effect on gait ability. In considered that training that simultaneously applies gaze stabilization exercise and cognitive training can be presented as a balance and gait rehabilitation for stroke patients on the future.

• 재활치료과학
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• 제9권4호
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• pp.69-81
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• 2020

목적 : 본 연구의 목적은 인지기능저하 노인을 선별할 수 있는 이중과제를 활용한 노인인지기능 선별검사를 개발하는 것이다. 연구방법 : 2019년 5월부터 8월까지 경기도 및 충청도에 있는 지역사회 기관에서 60세 이상 노인 229명을 대상으로 개발된 Y-DuCog(Yonsei Dual Task Cognitive Screening Test)의 신뢰도 및 타당도 검증과 인지기능저하 노인의 분류 기준점을 확인하였다. 결과 : MMSE-K, MoCA-K와 Y-DuCog와의 상관분석을 실시한 결과 Y-DuCog의 이중과제 효과와 이중과제 초당 정답 수에서 상관관계를 보였다. 내적 일치도 분석 결과 이중과제 효과와 이중과제 초당 정답 수의 Cronbach's-α 값은 각각 .848(p<.01), .916(p<.01)의 신뢰도를 보였고, 검사-재검사 신뢰도는 ICCs가 .969~.996으로 높게 나타났다. 선별기준점은 총 수행시간 DTE에서 31.76초를 기준으로 88.7%의 민감도와 83.5%의 특이도를, 총 이중과제 CRR에서 0.38개를 기준으로 84.5%의 민감도와 76.6%의 특이도를 보였다. 결론 : 본 연구를 통해 Y-DuCog의 신뢰도 및 타당도가 검증되었다. Y-DuCog는 기존 지필 평가의 제한점인 교육수준과 문자에 영향을 받지 않으며 간편하고 빠르게 검사를 시행할 수 있어 노인의 인지기능 평가 및 중재 방법에 대한 효과성 검증 시 사용될 수 있을 것으로 기대한다.

• 한국과학교육학회지
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• 제22권5호
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• pp.923-943
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• 2002

The purpose of this study was to investigate the relation between the levels of cognitive conflict and students' conceptual change. In this study, 30 Korean high school students were selected from 450 10th graders by examining the pretest results. Two different strategies were used to induce cognitive conflicts in students, an anomalous or conflict situations; demonstrations and logical arguments against students' preconception. After arousing the students' cognitive conflict, the level of cognitive conflict was rated. Pretest, post-test and delayed post-test were administered to check the conceptual change. The tests consisted of 5 items in mechanics and electricity, respectively. Therefore, the demonstration method showed effective conceptual change, more than the logical argument method did. Students changed their conceptions more easily and frequently in the area of mechanics than in electricity. Students who showed higher levels of cognitive conflict indicated more positive conceptual change than those who showed lower conflict levels. 59 cases (56%) out of 105 who experienced high levels of cognitive conflict were changed into scientific conceptions one month later; however only 16 cases (35%) out of 46 who experienced low levels of cognitive conflict changed into scientific conceptions. Students who experienced higher levels of cognitive conflict showed higher rates of conceptual change. It could be concluded that designing instruction to induce cognitive conflict is a useful strategy to promote conceptual change.